Average students who work hard usually do better than clever students who are _________.
A. steady
B. tedious
C. idle
D. keen
变压器储油拒的作用是保证油箱内总是充满()，并减少油面与空气的接触面
A. 水
B. 油
C. 空气
Application papers may be sent ________ e-mail.
A. in
B. via
C. on
D. for
Having no money but ________ to know, Joe simply said he would go without dinner.
A. not to want anyone
B. not wanting anyone
C. wanted no one
D. to want no one
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