4．It is difficult for me ____________(finish)the task in one hour．

3．The boy ___________(play)basketball over there is my brother．

2．The streets___________(light)by electricity．

1．Liu Yiting___________(change)a lot since she entered Harvard University．

10．Mrs. Green is always worried about her son’s ___________(safe)．

9．I am not sure about the______(pronounce)of this word．

8．It’s__________ (polite)to talk loudly in the library．　　

7．He looked __________(worry)when I saw him．

6．I used to________(study)English by reading English newspaper．

5．He___________(probable)didn’t try his best to do the work．