单项选择题

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

A．for that
B．at that
C．with that
D．in that
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单项选择题
With the introduction of the computer, libraries today are quite different from ______ they were in the past.
A．that
B．what
C．which
D．those
单项选择题
______ he is still working on the project, I don't mind when he will finish it.
A．In case
B．As long as
C．Even if
D．As far as
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