When did Tom come to Qingdao—It was in July，2006 and he atrip in China with his parents at thattime

n’t surf the internet before youfinish your homework, ______ you

下列各句中，没有语病的一项是

The last thirty years _____ the greatest number of laws stopping our rights and progress,until today we have reached a stage ____ we have almost no rights at all

se me, can you show me the way to the nearest bus stop— Sorry. I’m a stranger here. I ______ here until my guide arrives.