To keep our city beautiful， the _____are always very busy in the streets．We shouldn't throw rubbish everywhere．（ ）
| A． |
policemen |
B． |
cleaners |
C． |
drivers |
The videos about cooking tell us how food_______ .（ ）
| A． |
makes |
B． |
made |
C． |
is made |
D． |
was made |
Learn ________ ，and you will be a successful learner.（ ）
| A． |
wisely |
B． |
lazily |
C． |
quickly |
D． |
blindly |
Don't you know passengers ________ smoke on high﹣speed trains？（ ）
| A． |
needn't |
B． |
mustn't |
C． |
wouldn't |
D． |
couldn't |
Our national hero Yue Fei _______ to devote （贡献） himself to the country at a young age.（ ）
| A． |
failed |
B． |
forgot |
C． |
promised |
D． |
refused |
Your dad has just fallen asleep.Don't wake him up ______ it's really necessary.（ ）
| A． |
unless |
B． |
or |
C． |
and |
D． |
but |