单项选择题

There are a limited number of books on this subject in the library.

A. small
B. total
C. good
D. great
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单项选择题
About one million Americans are diagnosed annually with skin cancer.
A. every year
B. severely
C. actively
D. every month
单项选择题
We will take your recent illness into consideration when marking your exams.
A. effect
B. account
C. effort
D. discount
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