问题
选择题
I'd rather not sign up for (登记) the Computer Camp because I last year. [ ]
A. had joined
B. has joined
C. joined
D. was joining
答案
答案：C
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I'd rather not sign up for (登记) the Computer Camp because I last year. [ ]
A. had joined
B. has joined
C. joined
D. was joining
答案：C