Please stay ______ bed and drink a lot ______ water. ( )

A．in, of

B．in, for

C．at, of

We see the stars __________. （    ）

A．at night

B．in day

C．day and night

The boys are______________ under the tree

A．have a picnic

B．having picnic

C．having a picnic

People can't live ________ now. (   )

A．under the sea

B．on the mountain

C．in the countryside

读句子并选出合适的词填空

A．on

B．in

C．by

D．from

E．to

F．of

【小题1】My family is very important________me.I love my family.
【小题2】The smoke ________the cars and buses makes the air dirty.
【小题3】—How did you go to Pairs for your holiday?
—I went there ________train.
【小题4】We get a lot of things________ trees.
【小题5】It keeps them high________ the sky.
【小题6】We live________ the Earth.The Earth is our home.
【小题7】What should we do________keep the air clean?
【小题8】Take a piece________cloth.