Reading this book, ________.

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A．a bird flew over his head

B．a bird flew on his head

C．he found a bird flying over his head

D．he found a bird flying on his head

It' s very kind ________ you ________ me.

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Your shoes are ________. You had better buy a new ________.

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She told my teacher they ________ it by 3 o'clock yesterday afternoon.

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They ________ a foreigner ________ to our school the next week.

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I don't know ________.

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May I have ________, Mum?

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They are going to fly to Shanghai. Jack ________, too.

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There was thick snow ________.

[　　]

They stopped in Moscow on the way, but only ________ an hour ________ two.

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