1. The door and the window are open. I think someone________ into our house!
A. breaks B. broke C. has broken D. will break
2. Jane________ Chinese, but she quitted because it was too difficult.
A. studies B. studied C. has studied D. will study
3. Dave ________ Chinese for six years now. He likes it.
A. studies B. studied C. has studied D. will study
4. We have worked here ________ 2002.
A. for B. since C. In D. to
5. The company ________ a new kind of smartphone. It looks fantastic!
A. just introduces
C. has just introduced
B. just introduced
D. will just introduce
6. Hoa is not coming to class today. She ________ back to her hometown.
A. goes B. go C. has gone D. will go
7. She has had this smartphone________ 10 years.
A. for B. since C. from D. in
8. This is a delicious cake, but we have________ had a big dinner and feel very full.
A. only B. just C. since D. for