Why ____ you keep on troubling me with such questions while I''m busy ?
| A．could | B．can | C．must | D．will |
---What are you busy with ?
--- We are carrying out a research _______ the causes of cancer.
| A．into | B．onto | C．to | D．in |
---I hear there will be ______ talk on English study tomorrow morning.
---Do you mean ______ speech our teacher asked us to listen to?
| A．a; the | B．the; a | C．the; the | D．a; a |
After I returned to my hometown, I was pleased to find that it had a new look.
| A．taken off | B．taken after | C．taken in | D．taken on |
Can you share a book with him？We’ll let you have a new one next Monday.
| A．at a time | B．all the time | C．for the time being | D．at one time |
Water is now in Yunnan of China.
| A．on need | B．in demand | C．by request | D．for requirement |