单项选择题

Criticism and self - criticism is necessary ______ it helps us to find and correct our mistakes.

A．by that
B．in that
C．on that
D．at that
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单项选择题
Women usually tend to be very ______ about what they wear.
A．especial
B．special
C．peculiar
D．particular
单项选择题
By the end of this month, we surely ______ a satisfactory solution to the problem.
A．have found
B．will be finding
C．are finding
D．will have found
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