单项选择题

It is not ______ much the language as the background that makes the book difficult to understand.

A. that
B. as
C. so
D. very
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单项选择题
Linda was ______ the experiment a month ago, but she changed her mind at the last minute.
A. to start
B. to have started
C. to be starting
D. to have been starting
单项选择题
Personal computers are no longer something beyond the ordinary people; they are ______ available these days.
A. promptly
B. instantly
C. readily
D. quickly
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