It is impolite to ________ those who are in trouble. We should help them out.
A.aim at B.laugh at C.knock at D.point at
________ the sentence on the blackboard and find out the mistakes in it.
A.Smile at B.Arrive at C.Shout at D.Look at
Summer camping is a great experience for students. It is good to help them .
A.wake up B.get up C.hurry up D.grow up
Don't ________ too late, or you will feel tired in class.
A.call up B.wake up C.stay up D.fix up
My friend plans to ________ her job and go to America for further study.
A.cheer up B.clean up C.pick up D.give up
In order to protect the environment, we shouldn't ________ any trees.
A.turn down B.put down C.cut down D.look down
