单项选择题
She had to make a living ______ washing clothes at that time.
- A. on
B. in
C. with
D. by
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The twins look much like each other, but they are different ______ nature.
A. in
B. about
C. on
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单项选择题
Can you give me some advice ______ how I can improve my English
A. in
B. at
C. on
D. for
