Susan knows ________ Chinese and she often talks with her Chinese students.

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Which goes the fastest ________ the three, the sun, the moon or the earth?

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This book is too difficult for me ________.

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Hello, Tom! Would you mind ________ me your dictionary?

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Sorry, this coat is too small, please show me ________ one.

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Why are you standing here? Do you have ________ to tell me?

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Changjiang River is one of the longest ________ in the world.

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________ do you usually go to visit your grandparents? Once a month.

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I have ________ this nice CD machine for about two years.

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________ we carry the new books from the library to the office now? No, you needn't, but you ________ do it tomorrow morning.

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