Which do you enjoy ________, basketball or volleyball?

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There is ________ water in the bottle, ________?

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We ________ last night, but we went to the concert instead, so we failed in the examination.

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The reason ________ he is late is ________ there was a breakdown on the railway.

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Father went to his doctor for ________ about his heart trouble.

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The tourist asked the guide what he ________ visit the next day.

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I wonder how he ________ that to the teacher.

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With a lot of difficult problems ________, the newly-elected president is having a hard time.

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We'll hold a meeting ________ talk about the problem.

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There are five pairs ________, but I'm at a loss which to buy.

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