American International Group was the largest insurance company in the US_______it, suddenly closed down in September 2008.
| A．after | B．since | C．as | D．before |
I have offered to point the house _____a week’s accommodation.
| A．in exchange for | B．with regard to |
| C．by means of | D．in place of |
Everything was perfect for the picnic ______ the weather.
| A．in place of | B．as well as | C．except for | D．in case of |
Don’t promise anything ______ you are one hundred percent sure.
| A．whether | B．after | C．how | D．unless |
We’ll have a picnic in the park this Sunday _________ it rains or it’s very cold.
| A．since | B．if | C．unless | D．until |
There were some chairs left over _____ everyone had sat down.
| A．when | B．until | C．that | D．where |