单项选择题

She pretended（）nothing had happened.

A．as
B．if
C．as though
D．since

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单项选择题
Mrs. Morrison invited us to the party, but our work（）, we politely refused her invitation.

A．not being finished
B．was not finished
C．not having finished
D．had not been finished
单项选择题
It depends on（）we will hold the sports meet next Friday.

A．if
B．if or not
C．that
D．whether
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