It is important ______ us ______ English well.A:for, to study B:for, to studying C:to, to study D:to, studying

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It is important ______ us ______ English well.A:for, to study B:for, to studying C:to, to study D:to, studying
It is important ______ us ______ English well.
A:for, to study
B:for, to studying
C:to, to study
D:to, studying

It is important ______ us ______ English well.A:for, to study B:for, to studying C:to, to study D:to, studying
A
固定短语:it be adj.(for sb.) to do sth.

A It's adjective for sb to do something..

for us to study