The teacher’s questions were challenging, but Smith answered them ________.
A. intelligent
B. diligence
C. intelligently
D. diligently
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Smith has no money to buy a bike, ________ a car.
A. not mention
B. let alone
C. neither is
D. nor does
Practise ________ every day and you will improve your pronunciation.
A. read
B. to read
C. reading
D. to be reading
Tell me the news ________ you get it.
A. before
B. until
C. once
D. beyond
评定表面粗糙度的取样长度一般默认含有()个评定长度。
A. 5
B. 3
C. 7
D. 9