摘要： He found it hard up with his class.
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He found it hard ________ his class that term．
- A.to catch up
- B.catch up with
- C.catching up with
- D.to catch up with
He found it hard _____ his class.
[ ]
A. to catch up
B. catch up
C. catch up with
D. to catch up with
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B. catch up
C. catch up with
D. to catch up with