Juliana worked harder to ______ for the time she had lost when she was ill.
| A．keep up | B．catch up |
| C．make up | D．take up |
I was lucky enough to get on the train before it ________.
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The man must be the leader of the group, easily ________ by his special uniform.
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Teamwork, or cooperation, is ________ it takes for a football team to win a game.
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The missing children haven’t been found yet. Something terrible ________ to them.
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—Hello, I’d like to see Doctor Smith at 3 o’clock tomorrow afternoon.
—Sorry, but he ________ a patient at that time.
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