问题
选择题
It is well known to us all ____ China sent up a manned spaceship to outer space
Successfully last year.
A．that
B．what
C．which
D．when
答案
答案：A
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It is well known to us all ____ China sent up a manned spaceship to outer space
Successfully last year.
A．that
B．what
C．which
D．when
答案：A
