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问题

I ________ work out the problem at first, but after my teacher showed me an example, I ________ get the answer easily.

A:couldn’t; was able to
B:can’t; could
C:wasn’t able to; could
D:was able to; was able to
正确答案是:
同类题型

______ has been reported in the newspaper, they were about to have peace talks between the two countries when an accident happened.

Jack is good, hard-working and intelligent. _____, I can’t speak too highly of him.

It’s no use _______ so much money onclothes

n had expected to see all his relatives when inhospital, but _________ came to see him while many of his friends offeredhim their help

Jacky is so careless. He my books and pens the floor when he walked past my desk just now.

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