Mrs Chen is very strict — we don’t dare to say a word she asks us to.A. untilB. beforeC.

问题补充：

Mrs Chen is very strict — we don’t dare to say a word she asks us to.

A. until

B. before

C. when

D. unless

答案：

A. until

B. before

C. when

(答案→)D. unless

解析：考查连词辨析。A直到…才；B在…之前；C当…时；D除非,如果…不；句意：陈夫人非常严格，如果她不要求，我们一个字都不敢说。故D正确。