The local TV program Kankankan(看看看) can often help solve problems and draw attention to situations ________ help is needed.
| A．that | B．whose | C．which | D．where |
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 |
On the morning of October 12, 1492, Christopher Columbus and his crew came to the shores of the Caribbean islands, mistakenly believing they ________ in Southeast Asia.
| A．arrived | B．had arrived |
| C．has arrived | D．would arrive |