This famous tower more than 300 years ago.
| A．build | B．builds |
| C．built | D．was built |
—What did you do for your mom on her birthday?
—I her a birthday cake.
| A．buy | B．bought |
| C．will buy | D．have bought |
Our teacher often tells usenough sleep every day.
| A．have | B．had | C．to have | D．having |
I in this school for three years.
| A．have studied | B．will study |
| C．am studying | D．studied |
Hurry up, you will be late for the meeting.
| A．so | B．or | C．and | D．but |