Hainan is a good place ________ for touring ________ for surfing. It has the best beaches and waves all the year round.

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Surfing is the most exciting sport that l have ________ done.

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He gave up smoking two years ago and has never taken it up again ________.

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You must ________ when you hear the sound of starting gun in the race.

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I practice ten hours a day, and I'm sure my dream of swimming across the English Channel will ________.

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－Where is Mrs. Smith?

－He told me he would go shopping. I think she ________ be in the supermarket now.

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If I locked myself out of my house, I ________ a window to get in.

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Tom ________ to take a test because he got to class too late.

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－Whose English book is this?

－I am not sure. It ________ be Kate's.

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If it ________ tomorrow we will have a picnic.

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