7．The old man lives a________．Nobody takes care of him．

6．The astronauts who flew to the space in Shenzhou VI are the national h_____.

5．The boy was　 always ______ (紧张)．

4．She is always in ______ (沉默)when others talk loudly．

3．He saw a car ______ (事故)on his way home．

2．Last year，I went to Hainan and I had an _______ (经历)．

1．I _______ (争论)with my brother yesterday morning．