(1)have a tendency to do sth. 有做某事的倾向

　　(2)tend to/towards 趋向/倾向于

　　tend to sb./sth. 照料，照看某人/某事

　　tend to do sth. 易于/往往会做某事

　　①I have a tendency to talk too much when I'm nervous.

　　我紧张时总爱唠叨。

　　②She tends (get) angry when others disagree with her.

　　别人不同意她的看法时，她很容易生气。

　　【答案】　②to get

　　 spring up突然兴起，迅速出现；跳起

　　(教材P30)Thus, from the blues, there sprung up a faster, livelier kind of music called jazz.

　　于是，从蓝调音乐发展出一种更轻快、更活泼的音乐形式，叫做爵士乐。

　　spring to one's feet 突然站起来

　　spring from 起源于，出身于，来自

　　spring sth.on sb. 突然提出/告知某人某事

　　①These rules spring from the needs of traffic.

　　这些规则源于交通的需要。

　　②She sprung a piece of bad news me.

　　她告诉我了一则坏消息。

　　【答案】　②on

　　 (教材P30)From the early 1930s to the early 1950s, traditional jazz went into a gradual decline, and was replaced by a new musical trend known as rhythm and blues, or R&B.

　　从二十世纪三十年代早期到二十世纪五十年代早期，传统爵士乐逐步衰退，由一种新的被称作强烈节奏蓝调或节奏怨曲的音乐潮流所替代。

(1)decline n．衰落，衰败；减少，下降 vt.& vi.衰落；下降；婉言谢绝