4.He goes on asking questions about the party and learns about Franklin’s quarrel with Dr.Candy.（go on doing sth.继续做（同一件事情）
5.Rachel is stubborn in resisting his enquiries about the Moonstone to the degree that she makes it seem as if she does not want the mystery to be solved.
6.One mistake could have resulted in a huge loss.（虚拟语气）
7.Fortunately he was successful in diving the diamond into nine large jewels.
8.It turned out that Godfrey had also seen Franklin move the diamond that night....
9....but when she changed her mind he had no choice but to go abroad to sell the diamond.（注意but的用法）
10.You should avoid being too straightforward.（avoid doing sth.）
Units 15－16
Ⅰ.重要词汇及短语
1.apply for申请；请求
2.straight away立刻地；毫不犹豫地
3.fit in（with） 与……相适应；与……相协调
4.hold back退缩；踌躇
5.take a while用一些（一段）时间
6.approve of赞同；赞许
7.have sth.in common with sb.和某人有共同之处