We wait until the traffic light turns green when we cross the road．（ ）
A．canB．mayC．must
The 24th Winter Olympic Games_____in Beijing and Zhangjiakou in 2022．（ ）
| A． |
is held |
| B． |
will hold |
| C． |
will be held |
Peter， would you like to go shopping with me？
I'd love to，_____I have to finish my homework first．（ ）
| A． |
so |
B． |
and |
C． |
but |
Hello， John． This is Mike． What are you doing now？
I'm watching a film on TV． It_____at 7：30 and will be on for another hour．（ ）
| A． |
starts |
| B． |
started |
| C． |
has started |
_____we leave the library before 5 o'clock？
No， you needn't． You can stay here until 5：30．（ ）
| A． |
Must |
B． |
May |
C． |
Can |
Jack， can you swim_____the river？
I don't think I can． It's too wide for me．（ ）
| A． |
over |
B． |
across |
C． |
through |