D．By guessing only.

答案　C

重点词汇

1．They lived on the earth tens of millions of years ago，long before humans came into being and their future seemed secure at that time.

千百万年前，它们(恐龙)就在地球上生活，比人类的出现要早得多，当时它们的未来似乎很安全。

come into being出现；形成；产生

come into use开始使用

come into power开始执政，上台

come into view/sight进入视线

come into fashion开始流行

注意：come into being无被动语态，也不能用于进行时态。

(1)Could you tell me how the word "dama" came into being？你能告诉我"大妈"这个词是怎么形成的吗？

(2)Computers first came into use in the early 1950s.

电脑最早于20世纪50年代初期开始使用。

(3)This government came into power at the last election.这一届政府是经上一次大选后上台执政的。

(4)Long skirts have come into fashion again.

长裙子又流行起来了。

[单句改错]

(5)The new teaching system was came into being in our school last year.

2．When scientists inspected the bones，they were surprised to find that these dinosaurs could not only run like the others but also climb trees.