Be careful about the news on red fire ants— measures to prevent the possible spread of them.
| A．take | B．to take | C．taken | D．taking |
It was not until the end of last year _____ the economy in our country began to develop rapidly.
| A．when | B．that | C．which | D．in which |
---Anna, you look so tired and wet all over!
---Well, you know, all morning I _______ my books to my new office on the third floor.
| A．am moving | B．have moved | C．had moved | D．have been moving |
---It was dangerous to throw that bottle out of the window. You could have hurt someone.
---I’m so sorry! I _______ .
| A．am not thinking | B．wasn’t thinking | C．haven’t thought | D．don’t think |
Tsinghua University, ______ in 1911, is home to a great number of outstanding figures.
| A．found | B．founding | C．founded | D．to be founded |
---May I take this book out of the reading room?
---No, you______. You read it in here.
| A．mightn’t | B．won’t | C．needn’t | D．mustn’t |