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

A．needn’t         B．can’t          C．aren’t           D．don’t

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

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

1. A.
   to clean, needn’t
2. B.
   cleaning,don’t
3. C.
   clean, aren’t
4. D.
   cleaned, can’t

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