She is such a shy girl that she always avoids ________ in public.

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They were all afraid of the air attacks from the enemy, just lying in the bed ________.

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-- You were out when I dropped in at your house.

-- Oh, I ________ for a friend from England at the airport.

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The students are ________ young people between the ages of sixteen and twenty.

-- Which of the three ways shall I take to the village?

-- ________ way as you please.

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-- Why are you so late?

-- Well, ________, my bike broke down halfway.

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-- Is ________ finished?

-- Not yet. My dirty clothes are still soaking in the washing machine.

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________ rivers and lakes have caused many fish ________.

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A．Have been polluted; die away

B．Being polluted; die out

C．Polluted; to die away

D．Polluted; dying out

-- When will they leave the station?

-- They ________ very soon.

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He became ________ college student in 1990, and then turned ________ soldier in 1994.

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