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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单项选择题
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
单项选择题
Until then, his family （） from him for six months.

A. didn’t hear
B. hasn’t been hearing
C. hasn’t heard
D. hadn’t heard
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