16.reliability n. 可靠性，信度

　　reliable 可靠的

　　例句14.He become strong and reliable.

　　Reliance n. 依靠，信赖

　　17.Reluctant a. 不愿的，勉强的

　　例句15.He grunted his reluctant approval.

　　例句16.In a reluctant manner; unenthusiastically.

　　18.remain v. 剩下，余留； v. 留待，尚须；v. 仍然是，依旧是

　　例句17.many crimes remain unsolved; many problems remain unresolved.

　　例句18.To remain calm; remain in control of oneself

　　例句19.His reasons remain obscure.

　　remains n. 剩余物，残留物

　　19.remark n. 评语，意见； n. 评论，谈论

　　n. 注意，觉察 ； a. 值得注意的；a. 显著的，异常的

　　例句20.An offensive personal remark

　　例句21.What prompted that remark? 那话是怎麽勾起来的?

　　Remarkable

　　例句22. The contrast is remarkable