—I’m afraid that I can’t do it.
—Oh, you should believe in yourself. You won’t know what you can do______ you try it.
| A．if | B．because | C．until | D．while |
— Could you tell me _____ yesterday?
—The Great Wall.
| A．where they go | B．where do they go |
| C．where they went | D．where did they go |
—Our school _____ in 1892.
—It has a very long history.
| A．built | B．is built | C．was built | D．will build |
—You look worried. What’s the matter?
—I _____ the exam yesterday.
| A．fail | B．fails | C．failed | D．will fail |
—Look! There _____ some tomatoes in the basket.
—Oh. How fresh!
| A．is | B．are | C．was | D．were |
I am a teacher and I _____ in this school for 5 years.
| A．teach | B．taught | C．will teach | D．have taught |