1．Once new difficulties________in our new job，we should learn to use our brains to solve them.
A．rise B．cause
C．raise D．arise
2．Hiking by oneself can be fun and good for health.It can be good for________ building.
A．respect B．friendship
C．reputation D．character
3．The loss has not yet been________accurately，but it is believed to be well beyond a hundred million dollars.
A．calculated B．considered
C．completed D．controlled
