The elevator _________ and we were trapped inside for half an hour.
| A．broke off | B．broke in | C．broke out | D．broke down |
I didn' t manage to do it _____ you had explained how.
| A．until | B．unless | C．when | D．before |
_____ he comes, we won't be able to go.
| A．Without | B．Unless | C．Except | D．Even |
I hurried _____ I wouldn't be late for class.
| A．since | B．so that | C．as if | D．unless |
_____ I catch a cold, I have pain in my back.
| A．Every time | B．Though | C．Even | D．Where |
What's the matter _____ they still haven't answered the telegram?
| A．when | B．that | C．though | D．however |