单项选择题

It is a question () the book will be published this month or next month.

A. if
B. whether
C. that
D. which

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单项选择题
I' ve got()today.

A. the bad toothache
B. a bad toothache
C. bad toothaches
D. the bad toothaches
单项选择题
The salary of an engineer is much higher()

A. than a teacher
B. than that of a teacher
C. in comparison with a teacher's
D. than of a teacher's
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