句子写作：HeisverybusypreparingIELTS.Hehasnotimetoplay.
He is very busy preparing IELTS; therefore , He has no time to play.
暂无解析
在发生人感染H7N9禽流感确诊病例的县(区)内，应当在病例确诊后开展为期()的强化监测
句子写作：Thepianoplayerbegantosingloudly.
流行性乙型脑炎的传染源是
Suchperson_______youdescribeisrarenowadays.
句子写作：TodayatschoolMrMoorebroughtinhispetrabbit.Heshowedittotheclass.