Our school basketball team will win the next match _________they practise more．（ ）
A．ifB．beforeC．thoughD．while
﹣Could you tell me_____you'd like me to pay you？
﹣You'd better use mobile payment． I don't care____it is Ali Pay or WeChat Pay．（ ）
A．how， whetherB．how， why
C．what， whetherD．what， why
Many shops in China_____to shut down as a new law against ivory（象牙）trade came into effect on January 1st， 2018．（ ）
A．orderedB．didn't order
C．were orderedD．weren't ordered
After long years of war， many people in Syria are homeless． I think it important_____ a peaceful world．（ ）
A．buildB．not build
C．to buildD．not to build
﹣Yuan Longping， a famous Chinese scientist， is now doing research on sea rice．
﹣If farmers____ start planting rice in salty water， China's food supply will surely rise．（ ）
A．canB．can'tC．mustD．mustn't
﹣I saw the light of your room was still on at two o'clock last night．
﹣Oh， I ____a football match of the Russia World Cup．（ ）
A．watchedB．was watched
C．am watchingD．was watching