As a teacher，he thinks his business is to stir up（）in his students rather than insist on obedience.

If you have to go through a smoke-filled area，you’d better（）with your head low.

A.crawl
B.retreat
C.proceed
D.drag

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Buckmaster，a very tall basketball player，stood upright，（）over his small child friends.

A.snake
B.fountain
C.museum
D.towering

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