Dolphins are _____ because their living codition is getting worse and worse.

A.in rich   B.in danger   C.in trouble    D.in safe

There wiil be ____ trees because of the big fire.

A.less   B.little   C.fewer   D.more

The old man lives in the mountain and he has lived ______ 100 years old.

A.to be  B.to   C.to by   D.to be on

We had fun _____ the robots do many different kinds of things.

A.to watch   B.watched   C.watching  D.watches

The boss makes the workers _____ long hours every day.

A.work  B.to work   C.works   D.working

______ will you come back from your work,dad:

In about half an hour,dear.

A.How long    B.How often   C.What time    D.How soon

There is _____ time left,is there?

A.few   B.little   C.a few    D.a little

It ____ us nearly a whole day to finish the work.

A.used  B.cost  C.took  D.spent

There ______ an meeting this afternoon.All of you should attend it.

A.will have   B.will be  C.will hold   D.has

It's possible __________ the old.We should often do so.

A.of us to help   B.for us to help    C.of us helping   D.for us helping