--- Can I walk across the road now, Mrs. Chen?
---No, you ______. You have to wait until the light turns green.
| A．couldn’t | B．shouldn’t |
| C．mustn’t | D．needn’t |
She plays ______ today．
| A．the football | B．the tennis |
| C．the guitar | D．piano |
He seems________.
| A．happily | B．happy |
| C．happiness | D．to happy |
It may take _________ years to make such robots ．
| A．hundred of | B．two hundreds |
| C．hundreds of | D．hundred |
There will be less ________．
| A．trees | B．people |
| C．pollution | D．cars |
I will be an engineer ____ ten years．
| A．after | B．in | C．at | D．on |