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單項(xiàng)選擇題

Processed food and food （）contains chemicals and preservatives should be avoided.

A.when
B.where
C.which
D.who

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單項(xiàng)選擇題

—Shall I use your dictionary? —（）

A.Certain；you may.
B.Ofcourse；you can.
C.Surely；you can’t.
D.No；please get out.

單項(xiàng)選擇題

Tests provide grades, but they also let you know what you need to spend more time（）and they help make your new knowledge permanent.

A.to study
B.study
C.studied
D.studying

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