Li Lei didn't play computer games last weekend.__________,he worked as a volunteer in an old people's home. ( )
A.InsteadB.CertainlyC.ThoughD.Gradually
They offered courses _________ students know the importance of protecting the Huanghe River.( )
A.helpB.helpedC.helpsD.to help
Compared with a 1﹣day weekend, a 2﹣day weekend is ____ as we may have enough time for our hobbies.( )
A.more pleasantB.less pleasant
C.the most pleasantD.the least pleasant
As soon as books ______, the volunteers posted them to the students in Hope Primary School.( )
A.are raisedB.were raised
C.raisedD.have raised
The children are jumping excitedly because they have _______ the design perfectly in groups.( )
A.completedB.controlledC.contactedD.caused
Max got lost and was trapped in the forest for 10 hours _______ a farmer nearby found him.( )
A.ifB.sinceC.untilD.after