—It’s important for students to obey traffic rules.
—Sure. Teachers always warn us ________ on the road because it’s very dangerous.
| A．to play | B．don’t play |
| C．not playing | D．not to play |
Haze (雾霾)appears around us. Let’s do ________ helpful to protect the environment.
| A．nothing | B．something |
| C．anything | D．a thing |
Nancy quickly ________ the door and put down her school things.
| A．opens | B．opened |
| C．has opened | D．is opening |
So many kinds of sweets! I really can’t decide _______.
| A．what to buy | B．which to buy |
| C．to buy which | D．to buy what |
Soon you _______ a senior high school student(高中生). Isn’t it exciting?
| A．become | B．will become |
| C．became | D．have become |
Please tell him to call me as soon as he _______ home.
| A．get | B．gets |
| C．got | D．will get |