题目内容
It is difficult _________ study English well, ________ he is working hard at it.
[ ]
A. /, and B. to, but even C. to, but still D. in, and still
答案:C
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题目内容
It is difficult _________ study English well, ________ he is working hard at it.
[ ]
A. /, and B. to, but even C. to, but still D. in, and still