单项选择题

______ you go on the earth, there is always gravity to keep your room from falling off.

A. When
B. Whenever
C. Since

D. Because
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It was in 1978 ______ the Whites settled down in France.
A. that
B. at the time
C. when

D. by the time
单项选择题
______ the train accident was a miracle.
A. The child would survive
B. Why the child survived
C. That the child survived
D. When the child survived
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