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
网友回答
A. It is known to all that
B. As is known to all that
(答案→)C. As we know
D. As it is known to all
解析:可联系答.案.网客服索取。