Scientists are working hard to make _______ possible for people to live on Mars in the future.
| A．it | B．that | C．this | D．one |
There __________ a big tree in front of my house . I could hear many birds sing in it .
| A．used to be | B．is used to be |
| C．used to have | D．was used to be |
Germany is __________European country and Korea is __________Asian country.
| A．an, an | B．a, a | C．a, an | D．an, a |
---Can you please tell me ___ ? ---It’s a quarter to eight.
| A．what time is it | B．what time it is |
| C．what time was it | D．what time it was |
Hello,boys and girls, please help ___ to some fish.
| A．you | B．yourself | C．yourselves | D．Your |
I’ll have my hair___. Can you go with me?
| A．cut | B．cutting | C．cuts | D．to cut |