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

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（）he is still working on the project, I don't mind when...

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

Because of the reduction of air pollution, this city no...

单项选择题Because of the reduction of air pollution, this city now is a good place（）.

A．where to live
B．which to live
C．to live in
D．to be lived

Criticism and self-criticism is necessary（）it helps us ...

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