单项选择题

The population of Pennsylvania increased from 50,000 in 1730 to more than 200,000 in 1763,______ to the thousands of Scotch Irish.

A．in effect
B．in consequence
C．in large part
D．at large

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单项选择题

Now scientists cannot realize ______ soon that existing scientific knowledge is not nearly so complete, certain and unalterable as many textbooks seem to imply.

A．so
B．very
C．too
D．nobody but

单项选择题

I'd rather you ______.those books of mine with you.

A．don' t take
B．didn't take
C．won' t take
D．not take

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