Most (A) oxygen atoms have (B) eight neutrons, but a small amount (C) have (D) nine or ten.
A.Most
B.have
C.a small amount
D.have

Frank’s wallet is lying on the coffee table. He ..... it here last night.
A.had to leave
B.will have left
C.must leave
D.must have left

I was reading the book last night before I went to bed. I never took it out of this room. It…. around here somewhere. Where…. it be?
A.should have been / shall
B.could lie / must
C.must be lying / can
D.had to be lying / will

Choose the underlined part among A, B, C or D that needs correcting.
Will I (A) help you with (B) this (C) suitcase, madam (D)?
A.Will I
B.with
C.this
D.madam

The student now realizes (A) that he should ask (B) more questions when (C) he was in training for this (D) job.
A.realizes
B.should ask
C.when
D.this

Carol couldn’t break (A) her leg (B) yesterday; she is (C) always very careful (D).
A.couldn’t break
B.leg
C.is
D.very careful

She.... be able to come on holiday next month if her parents give her permission.
A.will
B.can
C.could
D.mustn't

We.... forget our identity card when we are travelling.
A.need
B.mustn’t
C.could not
D.have to

Look! She is laughing. She.... something funny or happy.
A.must have
B.must have had
C.could have had
D.can’t have had

Your diving equipment.... regularly if you want to keep it in good condition.
A.may be cleaned
B.can’t be cleaned
C.can clean
D.must be cleaned