题目内容
The twins have studied in this school .
A.two years ago | B.since two years ago |
C.for two yeas ago | D.since two years |
B
试题分析:句意:这对双胞胎两年前就已经在这所学校里学习了。Since加时间点用于现在完成时时态的句子中;故选B。
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