She _________ be here．I saw her come in．

can

may

should

must

I was so tired this morning that I couldn’t _________ early as usual．

get up

get on

get off

give up

Beijing, _________ capital of China, has _________ long history．

a, a

the, 不填

the, a

不填, the

The teaching building has five floors．My classroom is _________ the third floor．

on

in

at

to

The factory _________ its waste into the river, but now it deals with the waste in a new way．

used to dump

is used to dump

used to dumping

is used to dumping

To improve his English, he spends _________ one hour a day listening to English programmes．

at last

at least

at once

at all

The art exhibition is really worth _________, and you’re sure to learn lot from it．

visit

to visit

visited

visiting

For everyone’s safety, we _________ a1ways remember the law against driving after drinking．

could

should

might

would

Linda, with her parents, _________ the Wolf Hill, and they will be back this afternoon．

has gone to

have gone to

has been to

have been to

Wearing white can help people _________ when they feel stressed．

fall down

calm down

look down

come down