We work together to achieve our common purpose: __________ world that is safer, cleaner and healthier than __________ one we are living in.

―The best time ______ Yangzhou is in spring.―Yes, I think so.

There is a board by the road，which ________ “Parking________”！[ ]

John was made ______ the truck for a week as a punishment.[ ]

To tell you the truth, I think it is you______ MrBlack______