问题
选择题
—How long do you think it will be ________ President Hu Jintao makes another visit to America?
—It all depends.[ ]
A. when
B. that
C. before
D. until
答案
答案：C
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—How long do you think it will be ________ President Hu Jintao makes another visit to America?
—It all depends.[ ]
A. when
B. that
C. before
D. until
答案：C