1.In time of emergency,You must keep calm.
2.He thought he had solved the problem,but it was not necessarily the case.
3.You shouldn't deal with the serious matter in a casual way.
4.A thick layer of fallen leaves and pine needles covered the grand land of the forest.
5.THe x-ray shows that the cancer cells have seriously invaded the chest.
6.Do you think you have the ability to win the match?
7.The criminal was caught when he was trying to escape form the city.
8.There were so many customers in the shop that the shopowner found it hard to receive them.
9.The workers are unloading the goods from the plane.
10.He got rid of those old friends who once helped him a lot as soon as he got rich.