单项选择题

All the hard tasks（） because of their joint effort, they decide to go on holiday for a month.

A. have been fulfilled
B. having been fulfilled
C. were fulfilled
D. having fulfilled

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Please（） from smoking until the airplane is airborne.

A. prevent
B. resist
C. refrain
D. restrain
单项选择题
When her parents died, Brenda （）of the house and all its contents.

A. discarded
B. dispelled
C. disposed
D. discharged
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