单项选择题

（）Michael is on vacation now, he may do some work from home

A. When 
B. If   
C. Once 
D. Even though

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Jane was sitting on the sofa （）her legs

A. crossing        
B. crossed
C. having crossed     
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I wouldn’t like to move to England （）the British pound is so strong

A. while   
B. until
C. unless 
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