动词填空  用括号内所给动词的适当形式填空。(本大题共8分，每小题1分)

小题1:Now a lot of families own cars and this _________ (cause) serious air pollution.

小题2:In Yixing, teapots(茶壶) _________ (produce) in large numbers.

小题3:The twins _________ (dig) in the garden when their mother came.

小题4:—Your city looks beautiful!

—Yes. Lots of trees _________ (plant) last year.

小题5:He is too busy ________ (do) his homework to go fishing with his parents at weekends.

小题6:Lucy is wondering where _________ (spend) her summer holiday.

小题7:We hope more and more people _________ (join) us to protect our environment.

小题8:Great changes __________ (take) place in Wuxi in the past five years.

杜加试验阳性可见于（）

A.肩关节脱位

B.肘关节脱位

C.Colles骨折

D.肱骨髁上骨折

E.锁骨骨折