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

2. Complete the sentences using the correct past simple or past continuous forms of the verbs in brackets.

(Hoàn thành các câu bằng cách sử dụng các dạng hiện tại đơn hoặc hiện tại tiếp diễn đúng của các động từ trong ngoặc.)

1. We (decide) ________ to form a volunteer club while we (prepare) ________ for our group presentation about people in need.

2. When we (arrive) ________ at the gate of the primary school at 5:30 p.m., lots of children still (play) ________ in the playground.

3. I (decide) ________ to talk with some of the children while we (wait) ________ for other group members.

4. While I (have) ________ a chat with Amy, her mum (ring) ________ to say she would come home late.

5. While we (have) ________ a discussion about how to help the children, we (agree) ________ to organise some after-school activities for them.

6. When An's father (come) ________ to pick her up after school, I (help) ________ An with her homework.

7. While we (present) ________ our volunteer project, the audience (raise) ________ a lot of questions.

8. He (get) ________ a phone call from a club member while he (write) ________ the club's programme for the next month. 

3. Match the beginnings (1-8) with the endings (a - h) to make sentences.

(Nối phần đầu (1-8) với phần cuối (a - h) để tạo thành câu.)