单项选择题

So confused ______ that he didn't know how to start his lecture.

A. since he became
B. would he become
C. that he became
D. did he become
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单项选择题
She managed to save ______ she could out of her wages to help her brother.
A. how little money

B. so little money
C. such little money

D. what little money
单项选择题
Our______sensitivity decreases with age. By age 60, most people have lost 40 percent of their ability to smell and 50 percent of their taste buds.
A. sensible
B. senseless
C. sensitive
D. sensory
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