问题描述：
You can't imagine the difficulty he ____into the cold river and saving the drowning girl.
A.had to jump B.had jumped C.had jumping D.had on jumping
he ____into the cold river and saving the drowning girl.修饰difficulty,根据and并列选C还是因为have difficulty （in）doing sth 的词组选C?
A.had to jump B.had jumped C.had jumping D.had on jumping
he ____into the cold river and saving the drowning girl.修饰difficulty,根据and并列选C还是因为have difficulty （in）doing sth 的词组选C?
问题解答：
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