Mary, put on your coat, ______ you'll catch a cold.
| A．and | B．or | C．so | D．but |
The man a doctor. The are nurses.
A．is, woman B．are, women C．is, women
does your father ?
A．What, do B．What, does C．Where, do
--- If you have any trouble, be sure to call me.
---________.
| A．I am glad to hear that | B．I will. Thank you very much |
| C．I have no trouble | D．I will think it over |
--- Hey, Paul ! Don’t you remember me?
--- ________. You are Peter. You used to sit in front of me.
| A．Yes, I do | B．No, I don’t | C．Yes, I don’t | D．No, I do |
Bob promises to join in the football match ________ he has to help his parents on the farm.
| A．if | B．as | C．unless | D．when |