Last summer when Mr Smith returned home from abroad, he found all his things in the rooms ________. His house ________.

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A．upside down; must have been broken into

B．upside down; must have broken into

C．down upside; might have broken in

D．down upside; might have been broken in

Little Tom wasn't conscious ________ being watched by the people at the party.

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When talking about Tangshan earthquake, he talked as if he ________ it.

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－Peter, has Professor Smith decided to attend your birthday party

－I have no idea. He hasn't ________ my invitation letter yet.

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Please stay ________. The help is ________.

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He ________ full marks, but he was so careless to make a spelling mistake.

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Galileo insisted that the earth ________ round the sun.

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It's not enough only ________ the rules of grammar if you are learning English.

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A．keeping in the mind

B．to keep in mind

C．to keep in your mind

D．keeping in your mind

－Alice, you feed the bird today, ________?

－But I fed it yesterday.

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________ blood if you can and many lives will be saved.

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