1._________ of your two sisters is studying in Australia? A.Who B.What C.Which D.Whose 2.So many people nowadays are _________computers and mobile phones.They use them a lot. A.addicted to B.bored with C.worried about D.afraid of 3.A tent can be_________pulled down and transported than a ger. A.more easily B.most easily C.although D.because 4.It’s a rule l,so everyone______stricltly follow it. A.should B.shouldn’t C.doesn’t have to D.has to