40.-I hear Jack once was ______ of losing his life.

　 ---Yes. But now he is ______.

　 A.in danger; out of the danger　 B.in the danger; out of danger

　 C.in danger; out of danger　　　 D.in the danger; out of the danger

39.It is ______ that light travels faster than sound.

　 A.sure　　　　　 B.certain　　　 C.possible　　　 D.doubtful

38.The father , as well as his two sons, ______ swimming every Sunday afternoon in summer.

　 A.go　　　　　　 B.is going　　　 C.are going 　　D.goes

37.We are taught that a business letter should be written in a formal style ______ in a personal style.

　 A.rather than　　 B.other than　　 C.better than　 D.more than

36.“WTO” ______ the World Trade Organization, as we know.

　 A.stand for　　　 B.stands for　　 C.stand out　　 D.stands by

35. Our English teacher told us to write a sentence on ______.

　 A.every few line　　　　　　　　 B.every four line

　 C.every other line　　　　　　　 D.each other line