I think mathematics is very difficult ______.

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• 1— I didn't tell him the news.— Oh, you ought _______.

  A.to　　

  B.notto

  C.nottohave　

  D.tohave

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• 2If I have any further news, you will be the first person ______.

  A.to know

  B.known

  C.knowing

  D.knew

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• 3— Shall we go outing this weekend?   — Oh, with all this work ______, I don't know if I'll have time to go out.     

  A.to do

  B.doing

  C.done

  D.do

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• 4Helen had to shout _____ herself _____ above the sound of the noise.  

  A.making;hear

  B.to make;hear

  C.making;heard

  D.to make;heard

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• 5With Father's Day around the corner,l have taken some  money out of the bank _____ presents formy dad.   

  A.buy

  B.to buy

  C.buying

  D.to have bought

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• 6Schools across China are expected to hire 50000 college graduates this year as short-termteachers , ________ reduce unemployment pressures.  

  A.help

  B.to have helped

  C.to help

  D.having helped

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• 7With a lot of difficult problems_____,the newly-elected manager is having a hard time.

  A.settled

  B.settling

  C.to settle

  D.being settled

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• 8—  Would you allow me ______ here?— Sorry. We don't permit ______ in the lab.

  A.smoking; smoking

  B.to smoke; to smoke

  C.smoking; to smoke

  D.to smoke; smoking

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• 9I like getting up very early in summer. The morning air is so good _____.

  A.to be breathed

  B.to breathe

  C.breathing

  D.being breathed

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• 10— Mum, I'm hungry. — What about going to McDonald's _____ fried chicken?

  A.eat

  B.to eat

  C.eating

  D.eats

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