1.There were a lot of cars on the road ,so they decided to have their car parked and walked ____a change.
答案:B .for
for a change 为了换换花样,为了改变一下方式
2.What is very interesting today is that many people set their watches or clocks ___Big Ben ,
答案:A .by
A .set + 钟表 + by ...按照...对表
3.My parents haven't been abroad ,so we are planning to go ____holiday to Japan .
答案:C .for
go for holiday 表示度假