单选题：_____ the activities might seem childish, in reality they re..

题目内容：

_____ the activities might seem childish, in reality they require a lot of strength and determination.
A. When
B. As
C. While
D. Once

参考答案：

The place was flooded _____ it had been raining for several ..

The place was flooded _____ it had been raining for several weeks.A. because B. because of C. ever sinceD. as a result of

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— What was the party like? — Wonderful! It's been years _____ I enjoyed myself so much.A. after B. before C. when D. since

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Never believe anything _____ any other person has believed it. Use your own head.A. that B. whenC. becauseD. once

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You will be successful _____you have confidence.A. before B. once C. untilD. though

分类：从属连词题型：单选题