--- ? --- They’re fine, thank you.
| A．How are you | B．Who are you |
| C．What are they | D．How are your mother and father |
---Does the teacher know everybody _______ planted the trees?·
---Yes, he does.
| A．which | B．whose | C．where | D．who |
I don’t know if he tomorrow. If he , I’ll meet him.
| A．will come; comes | B．comes; comes |
| C．will come; will come | D．comes; will come |
We won’t put off our plan __________ it snows heavily tomorrow.
| A．whether | B．unless |
| C．because | D．While |
______ he talked with her for a long time, he failed to convince(说服)her.
| A．Though | B．But | C．Since | D．As |
Take a map with you while traveling ________ you have a guide or know the city well．
| A．since | B．if | C．unless | D．because |