---The zookeeper was really annoyed with me.
--- How could he have been if you _______ stones at the animals?
| A．didn’t throw |
| B．don’t throw |
| C．hadn’t thrown |
| D．haven’t thrown |
．Good job! Not a single mistake ______ in your homework.
| A．you made | B．made you | C．did you make | D．you did make |
If you ______ half an hour every day for English reading, you are sure to improve your reading ability.
| A．set aside | B．put away | C．take up | D．give off |
Hi, somebody ______ the window, please. It’s too cold in here.
| A．closes | B．close | C．will close | D．is closing |
．______ you think you can or not, you must finish the project before Friday.
| A．If | B．Unless | C．Though | D．Whether |
Recently Shanghai has a lot of visitors, most of _____ come to see the 2010 Shanghai Expo
being held now.
| A．who | B．whom | C．them | D．they |