Some girls feel ________ if they see a snake．

A．frighten

B．frightened

C．frightening

D．to frighten

Wild animals can walk easily________ the rainforest．

A．though

B．past

C．through

D．across

The old man has no room to ________．

A．live in

B．live in

C．to live

D．lived in

If no one ________ animals fur, people ________ wild animals any more．

A．buys, don’t kill

B．buys, won’t kill

C．will buy, don’t kill

D．will buy, won’t kill

Some dogs can help farmers ________people ________them．

A．but; protect

B．because; take

C．before; get

D．if; train

If anyone is in danger, a helpful man is sure to him．

A．save

B．kill

C．laugh at

D．leave

If we do ________, soon giant pandas will die out．

A．nothing

B．everything

C．something

D．anything