What was the fiercest （最兇猛的） animal in history？The answer is the Tyrannosaurus rex （霸王龍）.This dinosaur lived in North America over 65 million years ago.It had a giant body，big head，sharp teeth and strong legs.All of （A） these made this animal the most powerful hunter in nature.But look at its arms.They were so small and short.It seemed that they must be useless.
   But in fact，their arms could do a lot more than we think.
According to scientists from Stockton University of the US，the dinosaur could turn the palms of its hands toward its chest.This might help the animal hold food close to its mouth for eating，Matthew Bonnan from the university told Live Science.
   Also，its small arms and large claws could be useful too.They could help to （B） tear into its food.Their arms were short，so they could move quickly.Scientists think the dinosaur could seriously wound his prey in just a few seconds.

（1）從文中找出（A）處劃線單詞these所指代的內(nèi)容。

A giant body，big head，sharp teeth and strong legs.

A giant body，big head，sharp teeth and strong legs.

（2）用英語列舉出兩條霸王龍手臂短小的好處。
①

The dinosaur could turn the palms of its hands toward its chest.

The dinosaur could turn the palms of its hands toward its chest.

②

They could help to tear into its food.

They could help to tear into its food.

（3）將劃線句子But in fact，their arms could do a lot more than we think.翻譯成漢語。

但事實(shí)上，它們的手臂能做的比我們想象的多得多。

但事實(shí)上，它們的手臂能做的比我們想象的多得多。

（4）根據(jù)短文內(nèi)容，猜測(cè)（B）處劃線詞組tear into 的意思。

A

A

A.撕裂
B.哭泣
C.吞咽