问题
How long do you think it will beChina sends a manned spaceship to the moon ?—Perhaps two or three years.[ ]
A: when
B: until
C:hina sends a manned spaceship to the moon ?—Perhaps two or three years/T
D: before
B: until
C:hina sends a manned spaceship to the moon ?—Perhaps two or three years/T
D: before
正确答案是：
同类题型
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