The heart is a（n） organ, It is of absolute importance to our body and life．

A． vital B． energetic

C． living D． lively

Generally speaking, the family, not the school, plays the role in educating children for life.

A. potential B. primary

C. personal D. professional

Early experiences taught me not to be overly _ about shopping by mobile phone because there is a high risk of being cheated．

A．particular B．enthusiastic

C．cautious D．casual

I’m always ________ about what I say because careless remarks are likely to hurt others’ feelings.

A. enthusiastic B. curious

C. doubtful D. cautious

Though brought up in Los Angeles, Steven Davidson spent his whole life in New York．

A．mostly B．constantly

C．roughly D．merely

There is still much to discuss. We shall, ______ , return to this issue at our next meeting.

A. however B. otherwise

C. therefore D. instead

With high technology introduced, the average output of the factory is increasing．

A．faithfully B．costly

C．steadily D．stately

“I don’t think it’s my _______ that the TV blew up. I just turned it on. That’s all.” said the boy.

A. error B. mistake

C. fault D. duty

John worked hard at his lessons and gained _____to a famous university last year.

A. permission B. admission

C. agreement D. freedom

The teacher wants his students to know more about modern science and tries hard to develop a（n） ___ about nature among his students．

A．curiosity B．habit

C．a(chǎn)bility D．independence