摘要： I don’t remember how many years ago people began to grow crops. A. it was when B. it was that C. was it when D. was it that
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I don’t remember how many years ago ________ people began to grow crops.
A. it was when B. it was that C. was it when D. was it that
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I don't remember how many years ago _____ people began to grow crops.
[ ]
A. it was when
B. it was that
C. was it that
D. was it when
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B. it was that
C. was it that
D. was it when
.
I don't remember how many years ago ______ people began to grow crops.
A. it was when B. it was that C. was it when D. was it that
查看习题详情和答案>>