A low-carbon(低碳) lifestyle has an effect our daily life. People are paying more and more attention to energies these days.
| A．in; save | B．in; saving | C．on; save | D．on; saving |
—You should ________ your son. He works harder than before.
—Thanks, I will.
| A．praise | B．punish | C．prove | D．provide |
—I ________ speak English in class because I’m afraid of making mistakes.
—Don’t be shy. Believe in yourself and everything will be OK.
| A．needn’t | B．dare not | C．dare not to | D．needn’t to |
The girl saves money ____________ help the poor in need of food .
| A．so that | B．in order that | C．in order to | D．in order |
Could you please speak a little ？ I can't follow you.
| A．quickly | B．more quickly | C． more slowly | D．slowly |
All of us must do_______ to help protect the environment，or we will have more hazy weather雾霾天气.
| A．something useful | B．anything useful | C．useful something | D．useful nothing |