1.I am going to work with my father at the store.
2.when he came back,the path was chean.
3.Flies sound much faster than a modern airliner.
4.There rockets will be able to carry 170 passengers at a time.
5.It was officially presented the statue had been put together by Barthold by the end of October,1886 to the American people again.
6.It is hard to stop smoking.
7.I am always afraid of making mistakes.
8.They are wondering what preseats they are going to have