For travel books it is enough to________ them.

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The old engineer is ________ to keep fit in many ways.

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These young workers will _______to fulfill the task.

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A．do their best

B．do my best

C．do the best

D．had best

The rich woman ________too much money on new clothes.

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Be sure to ________the lights when you leave your classroom.

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Mr Paul is a good teacher. He often has a strange way ________ making his classes ________.

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He put his hand on his forehead. It felt ________.

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Plants grow well ________there is enough water.

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________he said is more than ________he did.

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We’ll get into trouble _______you are not careful.

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