________ an important decision more on emotion than on reason, you will regret it sooner or later.
| A．Based | B．Basing | C．Base | D．To base |
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 |
For many cities in the world, there is no room to spread out further, _______ New York is an example.
| A．for which | B．in which | C．of which | D．from which |
I haven’t seen Ann for ____ long that I’ve forgotten what she looks like.
| A．such | B．very | C．so | D．too |
Elizabeth has already achieved success _____her wildest dreams.
| A．at | B．beyond | C．within | D．upon |