You`ll do much better in your exam ______ you`re more careful with your spelling.

This summer, several provinces in the south of China was struck by floods, from ______effects the people are still suffering.

A post office should be built in a central ______ for the sake of the convenience.

His sister doesn’t go to the zoo. ____________.

The Group of Eight(G8) __ the eight richest countries in the world.