问题
选择题
He was a good swimmer so he _____ swim to the river bank when the boat sank. [ ]
A. is able to
B. could
C. was able to
D. can
答案
答案：C
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He was a good swimmer so he _____ swim to the river bank when the boat sank. [ ]
A. is able to
B. could
C. was able to
D. can
答案：C