单项选择题

Because of the poor harvest, wheat prices have ______ in the last six months.

A. added
B. jumped
C. amounted
D. developed
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单项选择题
We felt very sad when we heard the news that the manager was killed in his office yesterday.
A. respectful
B. respectable
C. respective
D. respecting
单项选择题
The ______ goal of the book is to help bridge the gap between research and teaching, particularly the gap between researchers and teachers.
A. joint
B. intensive
C. overall
D. decisive
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