― Why ______ you stay in the countryside, where it is not convenient to go shopping?
―But I’ve found it rather valuable for my health.
| A．can | B．must | C．may | D．shall |
—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 |
Not only ________ polluted but also ________ crowded.
| A．is the city；are the streets |
| B．the city is；the streets are |
| C．is the city；the streets are |
| D．the city is；are the streets |