I was surprised by her words, which made me recognize ________ silly mistakes I had made.

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Mrs. Smith was very much impressed by ________.

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A．what had seen in China

B．that she had seen in China

C．what she had seen in China

D．which had she seen in China

No bird and no beast ________ on the lonely island.

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________ the night, we did nothing but ________ there, waiting for him to come.

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He earned enough money to start his own business ________ offering guide services ________ tourists.

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________ has been announced, we must hand in our graduation papers before the end of June.

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________, someone knocked at the door.

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A．Having finished my homework

B．While I was doing my homework

C．Doing my exercises

D．When doing my exercises

－Look! Everything here is under construction.

－What's the pretty small house that ________ for?

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Reporters keep an ear to the ground so as to know as soon as possible what will happen. The underlined phrase means “________”.

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A．lie down and listen to the sound from the ground

B．want to know where the news is

C．ask the way to the place where the accident happened

D．pay attention to the way things are going, or seem likely to go

Alice's second-hand computer ________ wrong although she used it only once.

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