1 In the teeming urban slums at time of plagues,______ airs thick with deadly contaminants swirled a
1 Thanks to increased focus on______ , Earth Day provides an opportunity for bars and restaurants to
3 Palermo Protocol calls for countries to ______human trafficking, punish offenders and provide shel
4 ______aid is an important resource for students who want to attend college but do not have enoughm
5 With thousands of universities around the world to choose from, everyone pursuing postgraduate stu
【題組】22 What is Amazon known for in 2017?(A) Creating a new AI robot.(B) Having its technical innovat