Hiking by oneself can be fun and good for health.It may also be good for ________ building.

 In modern times，people have to learn to ________ all kinds of pressure although they are leading a comfortable life.

. It isn’t so much whether he works hard; the question is whether he works _____.

Mr. Huang will ________ in the movement.

—Why didn’t you finish the task?      —I didn’t think it is ________ the effort.