单项选择题

The whole program is well designed, but some details need further（）by some experts.

A. proofing
B. modifying
C. demonstrating
D. polishing

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单项选择题
Why are some of us good at math, or writing, while others（）at art or basketball

A. work
B. gaze
C. aim
D. excel
单项选择题
He doesn’t seem to be able to（）any interest in his studies.

A. make up
B. work up
C. turn up
D. use up
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