Choose the best options to fill the blanks.

1. When the children ____, it suddenly began to rain.

A. were playing B. played C. have been playing

2. Your hair looks terrific! ____ you ____ a haircut?

A. Had - got B. Have - just got C. When - got

3. I ____ to Da Nang twice, but I still get a lot excited whenever visiting the city.

A. went B. have gone C. have been

4. While my younger sister was studying in her room, someone ____ our house.

A. was breaking into B. broke into C. break into

5. My grandparents are not used ____ technological devices.

A. to using B. for using C. to use

6. This is the second time I ____ a car accident.

A. witness B. witnessed C. have witnessed

7. While the guests ____ the party, the servants ____ more foods and drinks.

A. were enjoying - prepared B. enjoyed – were preparing

C. were enjoying - were preparing

8. X-rays are a modern tool that doctors use ____ malign tumors.

A. for treat B. for treating C. to treating

9. ____ your mobile phone and ____ electricity, you can get a solar charger.

A. To recharge – saving B. For recharging - save C. To recharge - save

10. Hi, Anna. Are you going to play badminton now? - Sorry, I ____ my homework yet.

A. don't finish B. haven't finished C. didn't finish