单项选择题

By the end of this semester, we surely ______ a satisfactory solution to the problem.

A. have found
B. will find
C. will have found
D. are finding
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单项选择题
In this private school, a dentist ______ the pupils' teeth twice a week.
A. injures
B. instructs
C. inspects
D. informs
单项选择题
Poor ______ he is, he remains honest and kind.
A. as
B. however
C. because
D. although
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