Why shouldn’t I buy a new coat — I haven’t bought _____ for five years.

–Excuse me, but can you tell me which road I should take to the post office?--______ of the four roads will do.

___ of the students in my class can arrive on time because of the sudden heavy rain .

There are two cars in front of the house.--One is mine, ________ is the mother's,

Many people have been ill with a strange disease these days, _______ we’d never heard of before.