Many kinds of animals are believed to have died out from the earth. A．withdraw

Many kinds of animals are believed to have died out from the earth.

A．withdrawn

B．vanished

C．found

D．hung

Many kinds of animals are believed to have _________ from the earth

A.withdrawn

B.vanished

C.found

D.hung

A．withdrawn

B．vanished

C．found

D．hung

It is easy for many kinds of insects to live in the desert because ______.

A．They only need a little food to survive

B．they are not afraid of the heat

C．They are too small to be attacked by other animals

D．they have a skin which is against water

From the passage, we can infer that ______.

A．humans have been cloned successfully

B．so far all cloned animals died because of many diseases

C．not all the cloned animals can survive

D．doctors can clone humans within two years

In the long history of natural evolution,many kinds of animals have______from the earth.

A．withdrawn

B．vanished

C．found

D．hung

How many people have died？

A．None.

B．Twenty.

C．Thousands.

D．Millions.

A．ought to have died

B．should have died

C．must have died

D．could have died

The author's experiments with different kinds of animals seem to prove that ______.

A．man and other animals have some similarities

B．man is the cruelest among animals

C．man is superior to other animals in some aspects

D．man is inferior to other animals in certain aspects