单项选择题

We send in a report every day, （）the manager knows what we're doing

A. so
B. and
C. but
D. or

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单项选择题

Sam bought a new cell phone （）he already had one

A. and
B. even though
C. if
D. when

单项选择题

Jane was sitting on the sofa （）her legs

A. crossing
B. crossed
C. having crossed
D. she crossing

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