The problem of the use of our natural resources may be divided into _________.
A.two parts
B.three parts
C.four parts
D.five parts

Minerals exist where they are _________.
A.because of the changing physical nature of the earth
B.because they are also need to be kept by soil
C.because they are great protectors
D.All are correct

You are very different ........................ your brother.
A.to
B.for
C.with
D.from

You will not pass the exam ......................... working harder.
A.unless
B.if
C.without
D.although

It was raining very ......................... so I had to wear my raincoat.
A.wet
B.badly
C.hard
D.heavy

Don’t let the good chance go ........................ .
A.by
B.on
C.over
D.off

In Britain, you’ll be given a key ........... the door when you’re 21 years old.
A.of
B.for
C.to
D.at

No one knows what is happening here ................. Mary and Tom.
A.and
B.but
C.however
D.with

What is ............. ,a dog or a cat?
A.intelligent
B.more intelligent
C.as intelligent
D.the most intelligent

________(41)
A.find
B.founded
C.be found
D.found