The ________ you are, the fewer mistakes you will make.
| A．careful | B．much careful |
| C．more careful | D．most careful |
— Do you know this computer?
— Yes. Last Monday.
| A．when he buys | B．when will he buy |
| C．when he bought | D．when did he buy |
English by many people around the world today.
| A．is spoken | B．was spoken |
| C．speak | D．spoke |
Tu Youyou is a Chinese scientist. She medicine since 1951.
| A．will study | B．has studied |
| C．studies | D．is studying |
Liu Yang is excited. He to Tian’anmen Square tomorrow morning.
| A．goes | B．will go |
| C．went | D．has gone |
— Must I wash my skirt tonight?
— No, you . You can wash it tomorrow.
| A．can’t | B．shouldn’t |
| C．needn’t | D．mustn’t |