Explanation
An action in a sentence can be represented in two ways, namely active and passive voice.
The passive voice always uses the past participle form of the main verb irrespective of any tense. Only the auxiliary verbs depend upon the sentence given in active voice.
The given sentence is in the active voice.
The correct answer is A) The hot chocolate cake was not forgotten by Barby.
Option A) is correct as the subject of the given sentence comes in the place of the object and vice versa. Also, the main verb is used in the third form.
Options B,C and D are not correct as'did not ' is not transformed, the third form of 'forget' is not used, and the correct answer is one of the given options respectively.
The correct answer is D) Why is noise being made by students?
Option D) is correct as the subject of the given sentence comes in the place of the object and vice versa. Also, the main verb is used in the third form.
Options A, B, and C are not correct as 'being' is skipped, 'are' cannot be used, and 'with' is not the correct preposition used respectively.
The correct answer is C) The sums were being solved by the students.
Option C) is correct as the subject of the given sentence comes in the place of the object and vice versa. Also, the main verb is used in the third form.
Options A, B, and D are not correct 'solving' should be transferred to 'being solved', the given sentence is not in the simple past tense, and 'been' cannot be used in the transformed sentence.
The correct answer is C)By whom is football being played?
Options A, B, and D are not correct as the structure of the question is wrong, 'being' is not used, and 'been' cannot be used respectively.
The correct answer is B)When will a laptop be purchased by Rehan?
Option B) is correct as the subject of the given sentence comes in the place of the object and vice versa. Also, the main verb is used in the third form.
Options A, C, and D are not correct as the sentence structure is not correct, 'been' cannot be used and 'a laptop will come after will respectively.
The correct answer is D) No passive voice.
Option D) is correct as the sentence has an intransitive verb and cannot be converted into passive voice.
Options A, B, and C are not correct as the sentence cannot be converted into the passive voice.
The correct answer is D)A new airport is going to be built.
Options A, B, and C are not correct as the given sentence is not in the future tense, 'be' is missed, and 'bein' cannot be used respectively.
The correct answer is B)Is being played
Options A, C, and D are not correct as the given sentence doesn't have a plural subject, and being is missed.
Tennis is being played by the players of our school at this time.
The correct answer is C) Are Watered as the passive verb should be in its third form.
Options A, B and D are not correct as the given sentence is not in the present continuous form and 'plants' are plural respectively.
Plants are watered by the gardener every evening.
The correct answer is D) Has not been written as 'yet' indicates present perfect tense.
Options A, B, and C are not correct as 'been' is not used, 'letter' is a singular noun, and the main verb is not used in its third form.
The letter has not been written by Rumi yet.
The correct answer is C) Were given.
Option C) is correct as the main verb is used in its third form with the correct helping verb.
Options A, B, and D are not correct as the sentence is in the past tense, the second form of the main verb cannot be used in a passive voice sentence, and 'Madame and Monsieur Curie' represents a plural noun respectively.
Madame and Monsieur Curie were given the Nobel Prize for Physics in 19031903.
The correct answer is A) was, discovered
Option A) is correct as the main verb is used in its third form.
Options B, C, and D are not correct as 'did' cannot be used , the question is of the past and 'America' represents a singular noun respectively.
When was America discovered?
The correct answer is B) is spoken
Option B) is correct as the main verb is used in its third form.
Options A, C, and D are not correct as the second form cannot be used, the sentence is not in the active voice, and 'is spoke' cannot be used respectively.
English is spoken all over the world.
The correct answer is D) Is being built as the sentence is the present continuous form and the main verb is used in the third form.
Options A, B, and C are not correct as 'A new sports centre ' doesn't represent a plural noun, helping verb is not used and the form of the main verb is not correct respectively.
A new sports centre is being built in my town.
The correct answer is A) are caused
Options B, C, and D are not correct as 'accidents' represent a plural noun, 'is cause' cannot be used, and 'are cause' also cannot be used respectively.
Many accidents at home are caused by slippery floors.
The correct answer is B)Is being sung
Options A, C, and D are not correct as the sentence is in the passive voice and the main verb cannot be used as it is, 'song' is singular and 'singing' is not transformed to 'sung' respectively.
A sweet song is being sung by Rahman in the concert.
The correct answer is C) Was being knitted
Option C) is correct as 'at that time refers past continuous tense.
Options A, B, and D are not correct as 'was' alone and 'has' cannot be used, and 'knit' is not used in its third form.
The correct answer is A) Are mixed
Option A) is correct as the sentence is in the simple present tense.
Options B, C, and D are not correct as the sentence does not indicate the future, the past and is in the simple present tense respectively.
It should be served very hot.
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