题目内容
用所给动词的适当形式填空:
( change, get along with, finish, leave, complete, work, keep, support, lead to, sit)
I'm sorry ________ you waiting for so long.
答案:to have kept
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题目内容
用所给动词的适当形式填空:
( change, get along with, finish, leave, complete, work, keep, support, lead to, sit)
I'm sorry ________ you waiting for so long.