1. Choose the best answers to complete the sentences.

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. were 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