问题
选择题
20. _______, English is one of the most important subjects.
A．It is known to all that
B．As is known to all that
C．As we know
D．As it is known to all
答案
答案：C
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20. _______, English is one of the most important subjects.
A．It is known to all that
B．As is known to all that
C．As we know
D．As it is known to all
答案：C