You had better not keep the window open , ____ ?
| A．will you | B．did you | C．had you | D．would you |
_________ in the adult ceremony, the senior students feel they are shouldering heavier responsibilities now.
| A．Swear | B．Sworn |
| C．Having sworn | D．To have sworn |
Tu Youyou won Nobel Prize in Medicine for her discoveries that helped doctors fight malaria and _______ caused by roundworm parasites.
| A．injections | B．infections |
| C．prescriptions | D．presentations |
In the face of various economic uncertainties at home and abroad, the government has carried out ________ reforms to boost the economy.
| A．bureaucratic | B．systematic | C．arbitrary | D．ambiguous |
—Dear me! It’s you, Bob! I ______ to recognize you at first sight!
—Nor did I! Time has changed us a lot!
| A．fail | B．failed |
| C．have failed | D．had failed |
— As we know, keeping positive is beneficial to the process of our work and study.
— You can say that again. Struggle not to let negative ideas_______.
| A．take over | B．take off |
| C．take on | D．take up |