Because of his degree， he refused to do（）he thought “low” work.

If I（） in your place， I wouldn‘t trouble him.

A. were
B. had been
C. could be
D. was to be

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These hamburgers （）nice，so they have all（）out.

A. taste， sell
B. are tasted， sell
C. taste， been sold
D. are tasted， been sold

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