The teacher speaks very loudly _______ all the students can hear her.
A. so that B. because C. since
Our teacher said sound___much more slowly than light.
| A．was traveling | B．travels |
| C．has traveled | D．traveled |
Will you please show me the way to the only tall building ___stands near the post office?
| A．which | B．where | C．that | D．who |
—Look! The boy in the white shirt ___be Tom.
--It ____be him. I saw him enter the library just now.
| A．must; can’t | B．must; mustn’t |
| C．may; shouldn’t | D．may; mustn’t |
Students should do everything they can __their study.
| A．improve | B．to improve |
| C．improving | D．improved |
If you are a little careful, I think you can _____the problem.
| A．get over | B．get in | C．get on | D．get off |