Upon reaching an/a ______ age, children are encouraged, but not forced, to “leave the nest”.
| A．appropriate | B．potential | C．permanent | D．automatic |
–I wonder how much you charge for your services.
-The first two are free the third costs $30.
| A．while | B．until | C．when | D．before |
The place the bridge is supposed to be built should be the cross river traffic is the heaviest.
| A．which; where | B．at which; which | C．at which; where | D．which; in which |
Students are always interested in finding out they can go with a new teacher.
| A．how soon | B．how often | C．how long | D．how far |
–It’s thirty years since we last met.
-But I still remember the story, believe it or not, we got lost on a rainy night.
| A．which | B．that | C．what | D．when |
you have seen both fighters, will win?
| A．Since; do you think who | B．As; who you think |
| C．When; whoever | D．Since; who do you think |