He found it increasingly difficult to read, _____ his eyesight was beginning to fail.
| A．and |
| B．for |
| C．but |
| D．or |
Visitors ________ take an animal or any other item prohibited by the Expo Bureau to the Expo Park.
| A．needn’t | B．may not | C．mustn’t | D．will not |
One way to understand thousands of new words is to gain ________ good knowledge of basic word formation.
| A．/ | B．the | C．a | D．one |
．Sorry, sir. I broke the window glass, but I didn’t do that ______.
| A．on purpose | B．in purpose | C．with purpose | D．for purpose |
．I don’t think it is going to rain the day after tomorrow, _______?
| A．do I | B．don’t I | C．is it | D．isn’t it |
I called ________ his house this morning, but he wasn’t in. So I left a message telling him I would call______ him the next day.
| A．on; on | B．at; at | C．at; on | D．on; at |