Glass milk bottles can be used again and again but they need thoroughly they?A. to clea

问题补充：

Glass milk bottles can be used again and again, but they need thoroughly, they?

A. to clean, needn’t

B. cleaning,don’t

C. clean, aren’t

D. cleaned, can’t

答案：

A. to clean, needn’t

(答案→)B. cleaning,don’t

C. clean, aren’t

D. cleaned, can’t

解析：need doing sth中 need是实义动词，构成反意疑问句要用do或don’t。