2. 职称考试
  3. They didn′t accept my invitation atfirst, but I ______ persuade them at last.A.c

They didn′t accept my invitation atfirst, but I ______ persuade them at last.A.c

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问题 They didn′t accept my invitation atfirst, but I ______ persuade them at last.
选项 A.could            
B.was able to
C.might            
D.can
答案B
解析考查情态动词。could是can的过去式，比can委婉，表示能够，但做了不一定成功；might表示可能．Be able to表示通过努力做成功了某事。由persuade them at last可知选B。
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