单项选择题

She remembered several occasions in the past_________she had experienced a similar feeling.

A．which
B．before
C．that
D．when
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单项选择题
John is_________hardworking than his sister, but he failed in the exam.
A．no less
B．no more
C．not less
D．no so
单项选择题
15（）

A．studying
B．practicing
C．working
D．shopping
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