Choose the underlined words that need correcting.
Many (A) teachers have devoted their (B) lives to (C) teaching, therefore (D) teaching is not a well-paid job.
A.Many
B.their
C.to
D.therefore

Choose the best answer to each of the following questions
He has refused, but he _________ change his mind if you asked him again.
A.might
B.may
C.can
D.must

Choose the best answer to each of the following questions
Tell her that she ________ be here by six. I insist on it.
A.may
B.must
C.ought to
D.might

Choose the best answer to each of the following questions
I’ve got __________ money to lend you now. I think you can ask Lyn for some.
A.few
B.a few
C.little
D.a little

Choose the best answer to each of the following questions
The twins used to play rugby when they were four year old, ________ ?
A.don’t they
B.didn’t they
C.didn’t used they
D.did they

Choose the best answer to each of the following questions
You ________ ask a woman about her age. It’s not polite.
A.must
B.need
C.musn’t
D.needn’t

Choose the best answer to each of the following questions
Their plans were cancelled _______ of a bad storm.
A.in spite
B.because
C.instead
D.in place

Choose the best answer to each of the following questions
I’ll lend you the money and you ________ pay me back till next month.
A.needn’t
B.mustn’t
C.need
D.must

Choose the best answer to each of the following questions
There are many ________ of pollution in our modern world.
A.resources
B.sources
C.foundations
D.bases

Choose the best answer to each of the following questions
Many people _________ that natural resources will never be used up.
A.view
B.consider
C.believe
D.regard