1.Carbon monoxide drained by the factories and cars pollutes the atmosphere badly.2.According to the letter from the industrial management engineer ,he has doubt on the feasibility of the plan.3.He has been sick for a month ,which holds up a lot his studies.4.This village was named by the tall mountain standing before it.5.Several days ago , a medical team formed by three doctors and two nurses left for the mountain area.6.I got known that his conclusions are based on the facts.7.Many parents had set aside a special money for the education the children before they were born.8.A cart drove into the playground with snow covering.9.Some time at the late night , the enemies had to withdraw.10.That's in the small ,they worked hard and looked forward the bright and happy future.
