单项选择题

Denise will get better （）she takes this medicine

A. and
B. once
C. though
D. since

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Helen's computer skills were poor, （）she didn't get the job

A. but
B. since
C. so
D. while

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（）in Hong Kong, Jessica shopped at some stores

A. Traveling
B. Not traveling
C. Having traveling
D. Being traveled

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