I like getting up very early in summer. The morning air is so good ____.
| A．to be breathed | B．to breathe | C．breathing | D．being breathed |
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 |