I like going to school________my bike．
| A．in |
| B．on |
| C．by |
| D．at |
Can you tell me _______ when I called you?
| A．what were you doing |
| B．what are you doing |
| C．what you were doing |
| D．what you are doing |
——Could you tell me?
——Glad to help.
| A．if I have been to the Great Wall |
| B．where did he study |
| C．how I can get to the post office |
| D．what’s your name |
Good weather, isn't it? Let's___a walk through the park.
| A．take | B．takes | C．taking | D．to take |
--Hurry up! The bus is coming.
--Wait a minute. Don’t cross the streetthe traffic lights are green.
| A．until | B．after | C．while | D．since |
They are going to go on a world tourthey will perform in ten different cities.
| A．that | B．what | C．in which | D．where |