Sách bài tập Tiếng Anh 10 trang 29 Unit 4 Grammar Kết nối tri thức Exercise 1

Choose the best answers to complete the sentences.

(Chọn các câu trả lời đúng nhất để hoàn thành các câu.)

1. While we ________ information for our presentation last month, we discovered that lots of people in our neighbourhood needed help.

A. were collecting       

B. are collecting  

C. collect             

D. collected

2. When we visited Mrs Lan this morning, she ________her lunch.

A. is preparing             

B. was preparing       

C. has prepared        

D. prepares

3. She told us her life story while we ________ her tidy the house.

A. are helping              

B. have helped      

C. were helping         

D. help

4. While we were cleaning her kitchen, we ________ a knock at the door. It was another old lady who lived next door.

A. are hearing              

B. were hearing    

C. hear                    

D. heard

5. We ________ to help old people clean their houses while we were talking to them later that day.

A. are deciding            

B. were deciding          

C. decided          

D. decide

6. While we ________ at the food bank, we met an old friend.

A. were helping           

B. are helping              

C. help               

D. helped

7. An old lady came to us and asked for help while we ________ at the bus stop.

A. are waiting              

B. have waited             

C. were waiting  

D. wait

8. When we came to the local orphanage, all the children there ________ their dinner.

A. are having               

B. were having            

C. have had        

D. have