单项选择题

As teachers we should concern ourselves with what is said, not what we think ______

A. ought to be said
B. must say
C. have to be said '
D. need to say
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The people at the party were worried about Susan because no one was aware ______ she had gone.
A. where that
B. of where
C. the place where
D. the place
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The Managing Director said that improving relations with the association would not be easy, but that they ______to try.
A. would have decided
B. decide
C. have decided
D. had decided
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