It was essential that we________ the lease before the end of the month.
A.sign
B.signed
C.had signed
D.were signing

Look! There are a lot of clouds! It.... soon.
A.is going to rain
B.has been raining
C.will be raining
D.will have rained

For the last hundred years, traveling.... much easier and very comfortable. Now you.... from New York to Los Angeles in a matter of hours.
A.becomes / fly
B.had become / flew
C.will have become / will fly
D.has become / can fly

The chairman requested that__________ .
A.the members studied more carefully the problem
B.the members study the problem carefully
C.with more carefulness the problem could be studied
D.the problem was more carefully studied

It is desirable that the plane ________ as light as possible.
A.be
B.is
C.was
D.were

I can’t find my shoes.
A.My shoes can’t have been found.
B.I wish I knew where my shoes were.
C.If I could have my shoes found.
D.I hope someone will know the place of my shoes.

“It’s high time the children ________ to bed.”
A.should go
B.go
C.went
D.would rather go

It was _________ time we went home after having spent the whole afternoon in the neighbor’s garden.
A.only
B.just
C.near
D.about

You ought to make up your mind now.
A.It is time you made up your mind.
B.Making up your mind is necessary.
C.You should have made up your mind.
D.It is possible to make up your mind.

You should give up smoking before it is too late.
A.It’s too late for you to give up smoking.
B.It’s never late to stop smoking.
C.It’s high time you gave up smoking.
D.Your smoking is too late to stop.