问题补充:
I do believe that swim across the river, but, in that situation, I do that.
A. am able; couldn’t
B. could; was able to
C. was quite able to; couldn’t
D. couldn’t was able to
答案:
A. am able; couldn’t
B. could; was able to
(答案→)C. was quite able to; couldn’t
D. couldn’t was able to
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