It is global warming, rather than other factors, _______ the extreme weather.
A that have led to B which has caused C which are causing D that has led to
．______ you think you can or not, you must finish the project before Friday.
| A．If | B．Unless | C．Though | D．Whether |
Recently Shanghai has a lot of visitors, most of _____ come to see the 2010 Shanghai Expo
being held now.
| A．who | B．whom | C．them | D．they |
—I wonder if you are still an employee in that small company?
—Oh, I ______, but now I’m a public servant in a government department.
| A．used to be | B．have to be | C．used to | D．did |
．—John, where are the cookies? Don't tell me you ate them all．
—_____. I couldn't help it．They were so good．
| A．Yes, I did | B．No, I didn't | C．Yes, I have | D．Why? Sound strange |
Mike had to walk home ______ his bike stolen．
| A．with | B．as | C．for | D．since |