1 . As we all know, a _______ (balance) diet is of great use for our health.

2 . The house_________（属于） to the old man was built hundreds of years ago.

3 . He often ________(埋头于) himself in the books. (根据汉语提示单词拼写）

4 . As a new student, I’m looking forward to ________ (be) more independent and responsible. (所给词的适当形式填空）

5 . It is known to all that sunshine is________（有益的）to plants. （根据汉语提示填空）

6 . So long as we never give up, we are_________to (一定做) achieve success. （根据汉语提示填空）

7 . Before you read the poster__________(以下的)，discuss what you know about HIV/AIDS.

8 . There was a __________ (爆发) of laughter in the next room. (根据汉语提示填空)

9 . People do not now believe in the _______ of ghosts.

A．existence

B．occurrence

C．evidence

D．birth

10 . Someone called me up in the middle of the night, but they hang up ________ I could answer the phone.

A．as

B．since

C．before

D．until