He found _______ very difficult _______ learn math well.

A. it; for
B. /; go
C. that; for
D. it; to
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科目:初中英語 來源:甘肅省期末題 題型:單選題

He found _______ very difficult _______ learn math well.
[     ]
A. it; for
B. /; go
C. that; for
D. it; to

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