I usually read a newspaper ________ I'm waiting for a bus.

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A：I want to give my sister ________.

B：How about a pet snake?

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A：Mary won't go shopping.

B：I won't go ________.

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A：Thank you very much. I am sure I can't pass the exam ________ your help.

B：You're welcome.

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A：________ the way, what does Mary like?

B：I think a book is a good gift for her.

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________ Sweden, doing something for someone is the best gift.

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My mom always asks me ________ my room myself .

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A：Can you pay ________ the bill?

B：OK．It's my turn this time.

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A：Are dogs ________ difficult ________ take care of?

B：I think so.

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In my mind, snakes are not ________.

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