The infrastructure of a country is makes everything run smoothly，including things like transport， irrigation， electricity，postal service， telephones and schools.

hool was built on a hill,so we had a very wonderful ________ from the top.

It is at the party ________ there is no doubt ______ we’ll meet Tom.[

_____ do you _____ English—I like it very much.

The teacher said, “Jerry, I hope you________more careful next time.”