Natural resources areverylimited.Theywill be exhausted in the near future.It is not true.Butitbecomes amajor concern around the world.This is a widely acceptedfact.
It is a widely accepted fact thatthereisa major concern around the world for the exhaustion oflimitednaturalresources in the near future,though it is unlikely to betrue.
再如:
The Mississippi River is one ofthelongestrivers in the world,and in spring time it often overflowsitsbanks,andthe lives of many people are endangered.
(1)We can imaginethebeautifulsurroundings.(2)There are many trees alongthestreets.(3)There is aclean river in the city.(4) There are manyfishesin the river.(5)Thereare willow trees on the one side.(6)Thereare somepieces of grasslandon the other side.(7)There are many flowerson them.
(1)Just imaginethebeautifulsurroundings if we make our cities greener.(2)Green treeslinethestreets.(3)A clean river winds through the city,in which alotoffishes abound.(4)On the one side stand rows of willowtrees.(5)Ontheother side lies a stretch of grassland sprinkled withmany yellowandred flowers.