问题
They were singing and dancing to _____ their high spirits though it was very cold.
A: keep up
B: build up
C: bring up
D: pick up
B: build up
C: bring up
D: pick up
正确答案是：
同类题型
____ the teacher expected, the students were very excited after hearing the good news.
He __________ the agreement at the meeting in public and left angrily.
we take the 10:20 train— No. If we took that train, we________too late.
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