摘要： - when has the country been open to international trade? -1978.I suppose. A.Since B.In C.From D.After 答案 A 解析 本题考查状语从句的引导词.句子时态为现在完成时.when相当于下文的1978.只有since+过去某一 时间点.句子才用现在完成时.故选A项.
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Mr Green has never smoked any more since his wife _____ him to give it up.
A. wanted B. persuaded C. advised D. suggested
---- We’d better hurry;we have no time left.
----- ______ Do you really to see the boring film?
A. So what ? B.Take it easy C. Take your time D. For what