The students all tell their problems to one of the more ____________teachers.
A. sympathetic
B. real
C. typical
D. understanding
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Materials have now become one of the most important factors ______ the advance of technology and industry depends.
A. on which
B. with which
C. of which
D. for which
Sailors like to go sight-seeing when they are ____________ in a foreign port.
A. off duty
B. in common
C. by chance
D. ahead of
He has finished Book Six, but we haven't taken the exam ____________.
A. yet
B. already
C. still
D. also
There has been a serious of the disease in the North.
A. outbreak
B. output
C. outcome
D. outrage