Đáp án + Giải thích :

I.

1. is 

This cake = số ít  

2. are

His exercises = số nhiều

3. is

grass ( bãi cỏ ) = số ít

4. is

My room = số ít

5. is

A report = số ít

6. is

The class = số ít

7. are

Books = số nhiều

8. is

This pencil case = số ít

9. is

Spides = số ít

10. are

Sandwiches = số nhiều

II.

1. His exerecise is done by him every afternoon. 

2. I am called every day. 

3. The floor is cleaned by Sam twice a day. 

4. A chocolate cake is eaten by us.

5. This house is sold by them.

6. A letter is written by William.

7. The dishes are washed by her every day.

8. This song is sung by everyone.

9. The floor is swept by him.

10. My dog is taken care of by me.

III.

1. was repaired 

S : The broken table ( vật ) + yesterday ( QK )

2. will be bought
S : A new mobile phone ( vật ) + next month ( TL )

3. are being watered

S : Flowers ( vật ) + now ( HTTD )

4. has been learnt

S : English ( vật ) + for 3 months ( HTHT )

5. was watched

S : Thi moved ( vật  )+ yesterday ( QK )

6. has been read

S : This book ( vật ) + three times ( HTHT )

7. was stolen

S : My motorbike ( vật ) + yesterday ( QK )

8. was broken

S : My watch ( vật ) + last night ( QK )

Bài I

1.is_có this

2.is_excercises có s

3.are_grass có s là số nhiều

4.is_my room là 1 phòng số ít

5.is_ có "a" là chỉ số ít

6.are_the class

7.are_books có "s" số nhiều

8.are_trường hợp này dùng are

9.are_chủ ngữ có s ở cuối từ

10.are_chủ ngữ có s

Bài II

1. He does his exercise every afternoon. => His exercise is fone every afternoon by him.

2. Somebody calls me every day. => I am called every day by somebody.

3. Sam cleans the floor twice a day. => The floor is cleaned twice a day by Sam.

4. We eat a chocolate cake. => A chocolate cake is eaten by us.

5. They sell this house. => This house is sold .

6. William writes a letter. => A letter is written by William

7. She washes the dishes every day. => The dishes are washed every day by her

8. Everyone sings this song. => This song is sang by everyone.