___ in the air, fuels give off heat.

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• 1“Good-bye, Miss Liu. I’m very pleased ___.”

  A. to meet you B. to have met you C. meeting you D. having met you

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• 2____ by the look on her face, she didn’t catch what I meant.

  A. Judging B. Judged C. Judge D. To judge

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• 3___ under a microscope, a fresh snowflake has a delicate six-pointed shape.

  A. Seeing B. Seen C. To see D. To be seen

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• 4Helen had to shout ________ above the sound of the music.

  A. making herself hear B. to make herself hear C. making herself heard D. to make herself heard

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• 5She could have done just as well as you, ____ the chance.

  A. given B. to give C. giving D. give

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• 6Don't leave the water ________ while you brush your teeth.

  A. run B. running C. being run D. to run

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• 7Mother warned the electric lamp.

  A. not to touch B. him not to touch C. him not touching D. him not touch

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• 8Some cities have passed laws that allow coal and oil ____ only if their sulfur content is low.

  A. burning B. to burn C. being burned D. to be burned

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• 9We shall ask for samples ___ and then we can make our decision.

  A. to be sent B. being sent C. to sent D. to have been sent

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• 10Let’s buy our tickets while I still have ___.

  A. a little money to leave B. little money left

  C. a few dollars left D. few dollars to leave

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