问题补充：
53. I’m afraid I can’t keep my classmates as I’ve missed so many lessons. I have to ask my teacher for help.
A. up
B. with
C. up with
D. on with
答案：
A. up
B. with
(答案→)C. up with
D. on with
解析：可联系答.案.网客服索取。
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