May I use your computer？
Sorry． I on it．（ ）
| A． |
work |
| B． |
am working |
| C． |
have worked |
Uncle Liang eats out because his wife always makes delicious food for him．（ ）
| A． |
seldom |
B． |
sometimes |
C． |
often |
We must protect animals． They are friends．（ ）
| A． |
us |
B． |
our |
C． |
ours |
Lucy is a/an girl． She always helps others when they are in trouble．（ ）
| A． |
upset |
B． |
weak |
C． |
kind |
Is that Mr． Zhou？
It be him． He has gone to Beijing．（ ）
| A． |
may |
B． |
can |
C． |
can't |