An overseas buyer got this painting for 4.46 billion US dollars.

对

错

AState-owned Chinese airlines.

BAll the Chinese airlines.

CChinese commercial airlines.

DInternational airlines.

ASouth American companies.

BCuban drug companies.

CCompanies in Caribbean island countries.

DCuban farm produce companies.

AThree memory hacks to make you smarter

BHow to use study strategies more effectively

CThe potential pitfalls of study strategies

DThe reasons for ineffective learning

ARereading is an effective way of memorizing words.

BYou can enhance the efficiency of learning by reviewing regularly.

CWe should injudiciously copy the most important facts of material into our notebooks.

DIt’s better to take notes using a laptop than with a pen and paper， because writing by hand is slower than typing.

AA pond in the center.

BAroma of flowers.

CMoonlight.

DBirds’singing.

ASand boarding.

BHiking.

CParagliding.

DSurfing.

Aenforcement

Binvestigative， prosecutorial， and legislative capacities

Cgovernment cooperation

DAll of the above

AChinese young people helped us improve the production.

BThe factory was established four decades ago.

CThis factory is all built by Chinese people.

DChinese young people helped to renovate this old factory.

AThey talk about race directly.

BThey don't think it decent to talk about race.

CThey think people do not have the right to talk about race openly.

DThey often talk about race indirectly.