We are all curious about what the astronauts have to ________ when they try to drink waterwhile standing on their heads.       

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• 1— Are you a teacher?  — No, but I  _____.

  A.used to

  B.was used to

  C.used to be

  D.used to do

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• 2They were determined to carry out the plan at first, but then we  ____ persuade them to changetheir minds.   

  A.would

  B.could

  C.were able to

  D.had to

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• 3They decided that the meeting should ____ on Monday.   

  A.hold

  B.happen

  C.be taken place

  D.take place

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• 4If you don't keep the meal in the  refrigerator on such a hot day, it may ____。        

  A.go out

  B.go away

  C.go off

  D.go down

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• 5Experts at the conference agreed that such a product with environmentally friendly technology is ____.    

  A.worth being promoted

  B.worthy of being promoted

  C.worthy of promoting

  D.worthy to promote

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• 6I have no experience related to _______, since it's the first time for me to handle such a problem.

  A.call upon

  B.live on

  C.take on

  D.draw upon

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• 7When we got to the top of the Mountain Tai, we nearly____.  

  A.under our breath

  B.lost our breath

  C.caught our breath

  D.out of breath

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• 8Johnson ____ his boss _____ his careless mistake.

  A.apologized…….. about

  B.apologized to…… about

  C.apologized to….. for

  D.apologized………

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• 9She spent a happy afternoon ________ her coins and stamps she had collected those years.

  A.to look for

  B.worked on

  C.sorting out

  D.watch over

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• 10He decided that he would drive all the way home instead of ________   at a hotel for the night.     

  A.putting down

  B.putting off

  C.putting on

  D.putting up

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