1.Exchanging houses for a few weeks is a good way of_____ a holiday.
A.has B.have C.having D.had
2.Tames are an _____which may fall on everybody.
A.right B.obligation C.task D.responsibility
3.He is _____ one of the greatest experts in that field.
A.supposedly B.usually C.deeply D.happily
4.Can I connect my laptop _____ the Internet?
A.to B.on C.in D.with