unemployment and crime are high, it can be assumed that the latter is due to the former

unemployment and crime are high, it can be assumed that the latter is due to the former.
A. Before
B. Where
C. Unless
D. Until

A. Before(答案→)B. WhereC. UnlessD. Until解析：句意：哪里失业人数多，犯罪就高。可以确定后者是由前者决定的。Before在……之前 Where在哪里 Unless除非Until到……为止，选B。

对的，就是这个意思

我学会了

答案：解析： （1）A;（2）B;（3）D;（4）C；（5）母亲白天做得劳乏，晚上一躺就睡着，使得他不敢大声赶，怕惊醒了她。