Glass milk bottles can be used again and again, but they need __________ thoroughly, ____they?
In many places of China, __________ bicycle is still __________ popular means of transportation.
—What is his speech about? —As he claims, communication is an effective way to __________ the generation gap between parents and children.
I__________ along the street looking for a place to park when the accident __________.
Would you permityour child to do such a thing if you are in __________ position of __________ parent?
Every means __________ been tried and all __________ well now.