A. cross B. crossing C. across D. to cross——青夏教育精英家教网—

摘要： A. cross B. crossing C. across D. to cross

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Be careful _____ the street. A. crossing B. cross C. across D. to cross

A. cross　　　　　　　　　　 B.crossing　　　　　　　　 C.acrossing　　　　　　　　 D.to across

It’s difficult for such a girl to swim ____ the river.

A. cross B. across C. crossing D. crossed

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