用所给动词的适当形式填空
1.  Lucy  __________ (come) to China last month.
2.  She watches TV every evening. But she ___________ (not watch) TV last night.
3.  Mary __________ (read) English yesterday morning.
4.  There _________ (be) no one here yesterday.
5.   I ___________ (call) Mike this morning.
6.  I listened but ___________ (hear) nothing.
7.  Tom ___________ (begin) to learn Chinese last year.
8.  My mother ________________ (not do) housework yesterday.