单项选择题

The vocabulary and grammatical differences between British and American English are so trivial and few as hardly ______.

A. noticed
B. being noticed
C. to notice
D. to be noticed
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单项选择题
Liquids are like solids ______ they have a definite volume.
A. in that


B. for that
C. with that


D. at that
单项选择题
Corn originated in the New World and thus was not known in Europe until Columbus found it ______ in Cuba.
A. being cultivated

B. having cultivated
C. been cultivated


D. cultivating
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