问题
选择题
I didn't go outing on National Day because the bad weather _____ the difficulty. [ ]
A. added up
B. added to
C. added up to
D. added
答案
答案：B
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I didn't go outing on National Day because the bad weather _____ the difficulty. [ ]
A. added up
B. added to
C. added up to
D. added
答案：B