From the picture above we can see that there are three trees in the picture, and one of them is growing very strongly. However, the other two trees lo...2015-11-05
As is vividly depicted in the picture, two drain pipes are draining much sewage into the river while some chimneys emit poison gas into the sky.Why do...2015-11-05
As is indicated in the cartoon above,a big crowded of drivers stay in cars on the road,waiting for their turn to go,with patience almost running up.In...2015-11-05