1️⃣ "The cat ate the mouse."
In the active voice, the subject (cat) performs the action (ate).
In the passive voice, the object (mouse) becomes the subject.
The verb "ate" in the active voice becomes "was eaten" in the passive voice.
Therefore, the correct answer is (b) The mouse was eaten by the cat. ✅
2️⃣ "She wrote a letter."
The active sentence uses the past tense "wrote."
The passive sentence will use "was written."
The object "a letter" becomes the subject.
Therefore, the correct answer is (b) A letter was written by her. ✅
3️⃣ "They are building a house."
The active sentence is in the present continuous tense ("are building").
The passive sentence will use "is being built."
Therefore, the correct answer is (c) A house is being built by them. ✅
4️⃣ "Someone has stolen my wallet."
The active sentence is in the present perfect tense ("has stolen").
The passive sentence will use "has been stolen."
Therefore, the correct answer is (b) My wallet has been stolen by someone. ✅
5️⃣ "The teacher will give the students homework."
The active sentence is in the future tense ("will give").
The passive sentence will use "will be given."
Therefore, the correct answer is (c) Homework will be given to the students by the teacher. ✅
6️⃣ "The police caught the thief."
The active sentence is in the simple past tense ("caught").
The passive sentence will use "was caught."
Therefore, the correct answer is (c) The thief was caught by the police. ✅
7️⃣ "They have finished the project."
The active sentence is in the present perfect tense ("have finished").
The passive sentence will use "has been finished."
Therefore, the correct answer is (b) The project has been finished by them. ✅
8️⃣ "The committee is considering the proposal."
The active sentence is in the present continuous tense ("is considering").
The passive sentence will use "is being considered."
Therefore, the correct answer is (c) The proposal is being considered by the committee. ✅
9️⃣ "People believe that he is innocent."
The active sentence has an implied subject ("People").
The passive sentence can be formed in two ways: "He is believed to be innocent" or "It is believed that he is innocent."
Therefore, the correct answer is (a) He is believed to be innocent. ✅
🔟 "Who wrote this book?"
The active sentence is an interrogative sentence.
The passive sentence will also be interrogative.
The subject "who" becomes "by whom" at the beginning of the sentence.
Therefore, the correct answer is (a) By whom was this book written? ✅