问题
have you ever been to Beijing before?–No. it is the first time that I ____here.
A:am
B:be
C:have been
D:had been
B:be
C:have been
D:had been
正确答案是：
同类题型
Tom was ______ that he couldn’t understand ______ difficult sentence.
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Nancy, don’t always _______ that old jacket. It doesn’t fit you.