问题补充:
regular exercise is very important, it is never a good idea to exercise too close to bedtime..
A. If
B. As
C. Unless
D. Although
答案:
A. If
B. As
C. Unless
(答案→)D. Although
解析:考察连词辨析。A如果;B随着;C除非,如果…不;D即使,尽管;句意:尽管经常锻炼很重要,但是锻炼到睡觉的时候却不是一个好主意。根据句意说明上下文是转折关系,故D正确。
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