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达标测评
Ⅰ. 单项填空
1. My sister is very good at English，for she is very quick to _________ to new words and expressions.
A．reach out B．stand for
C．hold up D．catch on
2. As a good friend of his, I offered Tom my congratulations __________ his passing the college entrance examinations.
A. at B. on C. for D. of
3. (2012·天津高二检测)He climbed silently _________ of seizing the thief __________ .
A. on purpose；by surprise
B. on purpose；surprisingly
