She said，“ Please be careful. Don't knock off the glass of water. ”—She asked me _________knockoff the glass of water.
| A．please be careful not to |
| B．to be careful not to |
| C．to be careful to not |
| D．not to be careful to |
Li Hua has been elected ________ monitor of our class to take ________ place of Ma Li.
| A．the；不填 | B．the；the |
| C．不填；the | D．不填；不填 |
—Would you like to help me with my work?
—_______
| A．With pleasure. | B．No，I wouldn't. |
| C．Yes，I would. | D．My pleasure. |
Before her first Harry Potter came out in 1997，J.K.Rowling ________ English for a living in Portugal.
| A．is teaching | B．had taught |
| C．has taught | D．would teach |
—How's your project going，Jack?
—________.I'm half finished with it.
| A．So far so good | B．It's up to you |
| C．Never mind | D．Forget it |
________ an hour every day has made a considerable difference to my health.
| A．Having walked | B．Walk |
| C．Walking | D．Walked |