The secretary didn’t make clear when and where the meeting would be held
| A．this | B．that | C．it | D．what |
I suggested that they set off early to avoid (避开) the traffic jam, _______ no one responded.
| A．on which | B．to which | C．about which | D．for which |
Nowadays, use____________of certain waste materials to protect the environment.
| A．is making | B．will make | C．is being made | D．will be made |
He has been heavily _______ to the bank since he bought that big house in Beijing.
| A．in debt | B．in peace | C．in danger | D．in cash |
---Tom, must you have the light______ all night? It’s really a waste.
---Sorry, I won’t do it again.
| A．burning | B．burned | C．to burn | D．to be burned |
You have done wrong to Jack, you should say sorry to him.
| A．to which | B．for which | C．in which | D．on which |