单项选择题

Helen apologized for __________ the party．

A．her not being able to attend
B．her being not able to attend
C．her being able not to attend
D．not her being able to attend
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单项选择题
Gravity not only caused bodies to fall __________ their speed.
A．and to increase
B．but also increase
C．and increase
D．but also increased
单项选择题
Was it __________ that the professor regarded with contempt
A．them who
B．he who
C．them whom
D．those
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