The petrol tank is empty. I _________it up before we left home.
| A．had to fill | B．would have filled |
| C．should have filled | D．could have filled |
Don't turn off the computer before closing all programs, ________ you could have problems.
| A．or | B．and |
| C．but | D．so |
I was glad to meet Jenny again, ______ I didn't want to spend all day with her.
| A．but | B．and |
| C．so | D．or |
（2013·北京卷)Many countries are now setting up national parks animals and plants can be protected.
| A．when | B．which | C．whose | D．where |
（2013·大纲卷）When I arrived, Bryan took me to see the house_ I would Be staying.
| A．what | B．when | C．where | D．Which |
The children,____ had played the whole day long, were worn out.
| A．all of what | B．all of which | C．all of them | D．all of whom |