父母的责任是抚养教育之女，警察的责任是依法执行公务，医生的责任是治病救人，这说明：
| A．不同的社会身份负有不同的责任 | B．只有承担责任，才能走向成熟 |
| C．责任意味着要付出代价 | D．承担责任有一定回报 |
This morning I _________ some new restaurants on the Internet because I wanted to take my mother to a nice one for her birthday.
| A． grew up | B． picked up |
| C． looked up | D． sent up |
I think he’s been drinking, _________ I’m not quite sure.
| A． if | B． as | C． until | D． though |
—Must I go to medical school and be a doctor like you,Mom?
—No, you__________, son. You’re free to make your own decision.
| A．can’t | B．mustn’t |
| C．needn’t | D．shouldn’t |
—Do you know________ boy in white?
—Sure. He's my classmate Jack. He hurt his leg badly and had to stay in ______ bed.
| A． a; / | B． the; the |
| C． a; the | D． the; / |
Now, people are worried about the safety of _________ . Everyone wants to eat healthily.
| A． houses | B． clothes | C． water | D． foods |