一、用“↗”或“↘”标出下列句子的升降调。
1. Do you know anything about our city?
2. We should put rubbish in the bin.
3. Can we smoke in the library?
4. What can we do to keep our school clean?

二、用所给词的适当形式填空。
1. My grandfather is (sit) on the sofa now.
2. What (make) the river dirty?
3. There (be) many people in the playground yesterday.
4. Don't (litter) in the classroom. We're ______ (clean) our classroom.
5. Our bedroom is (clean) now.

()1.______ the city tidy,we shouldn't put the shared(共享的) bikes everywhere.
A.Keep
B.To keep
C.Keeps
D.Keeping

()2.There ______ some rubbish in the bin.
A.is
B.am
C.are
D.have

()3.Lily often ______ to the cinema.
A.rides a bike
B.by bike
C.on foot
D.rode

( )4.(苏州昆山改编)“— Do you throw rubbish on the floor? — No,I don't.”中句子的升降调正确的是“”。
A.↗；↗
B.↗；↘
C.↘；↘
D.↘；↗

( )5.(南京江宁区改编)If we want to make the air clean,we should not ______.

A.cut down too many trees
B.use paper bags
C.take the bus or the metro

四、按要求完成句子。
1. Toys make the floor messy. (对画线部分提问)
the floor messy?
2. We can sweep the floor to keep our classroom clean. (对画线部分提问)
can you to keep classroom clean?
3. There were some fish in the river two years ago. (改为一般疑问句,并作肯定回答)
—fish in the river two years ago?
—,.
4. What can you do to keep your room clean? (根据实际情况回答)