It’s said that non-smokers who are always around smokers have almost the same ______ of suffering from lung cancer.

Dogs are our good friends as they can keep ______ with us when we are lonely．

The government will begin a series of_____ to help the public fully understand the new educational system．

lt seemed such a       that people just stood by watching the old lady lying on the ground suffering pains.

At first ______, the bag seems made of real leather. But actually it is just an imitation.