What was the fiercest （最凶猛的） animal in history？The answer is the Tyrannosaurus rex （霸王龙）.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）从文中找出（A）处划线单词these所指代的内容。

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

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

（2）用英语列举出两条霸王龙手臂短小的好处。
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）将划线句子But in fact，their arms could do a lot more than we think.翻译成汉语。

但事实上，它们的手臂能做的比我们想象的多得多。

但事实上，它们的手臂能做的比我们想象的多得多。

（4）根据短文内容，猜测（B）处划线词组tear into 的意思。

A

A

A.撕裂
B.哭泣
C.吞咽