Life on Mars will be better than life on Earth __________many ways.
| A．on | B．in |
| C．at | D．for |
Our city is one of _________cities in china.
| A．the biggest | B．biggest | C．bigger | D．the big |
It is necessary for us _______them every day.
| A．looking after | B．to look after | C．look after | D．to looking after |
I ______ go to bed ______ my father came back.
| A．won’t, until | B．didn’t, until |
| C．will, until | D．/, when |
_____ big fish they are!
| A．What | B．How | C．What a | D．How a |
You ______ be polite to the old man.
| A．should | B．can’t | C．might | D．mustn’t |