I had to buy ________ these books because I didn't know which one was the best.
| A．all | B．none | C．both | D．neither |
Mike is my good friend. He is ________American boy.
| A．a | B．an | C．the | D．/ |
—Welcome to Hechi!
—____.
| A．That’s all right. | B．Thank you. |
| C．It doesn’t matter. | D．Certainly. |
—Excuse me. How long can I keep the dictionary?
—You canreturn it next Monday.
| A．give it away | B．come up with it |
| C．give it back | D．lend it again |
—I don’t know ____ .
—Because he has to look after his mother.
| A．why he is leaving | B．why is he leaving |
| C．when he is leaving | D．when is he leaving |
—Would you like to go swimming with me?
—I’d like to .But I’m busy ____ my homework.
| A．do | B．to do | C．done | D．doing |