单项选择题

I've kept up a friendship with a girl whom I was at school ____________ twenty years ago.

A．about
B．since
C．till
D．with
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单项选择题
In what ____________ to a last minute stay of execution, a council announced that emergency funding would keep alive two aging satellites.
A．applies
B．accounts
C．attaches
D．amounts
单项选择题
The logic of scientific development is (such) that (separates) groups of men working (on) the same problem in (far-scattered) laboratories are likely to arrive at the same answer at the same time.
A．such
B．separates
C．on
D．far-scattered
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