1.but when I got to --- the town ought to have been,all I fo

1.but when I got to ___ the town ought to have been,all I found was a school and a petrol station.A.where B.whereverC.there D.that正确答案是A2.I'll see to it ____ everything is ready in time.A.whether B.ifC.what D.that正确答案是D3.The government has promied to do ___ lies in its power to ease the hardships of the homeless.A.what B.that C.all what D.which正确答案是A4.We had hoped to give you a chance ___ nobody else ever had.A.as B.such C.as such D.such as正确答案是D5.After ___ seemed a very long time,the badly-wounded soldier came back to life.A.that B.it C.what D.which正确答案是C我想知道为什么是这些答案.