What's the ________ river in the world？

A.What 's

B.Whats

C.Whats '

A.on

B.to

C.in

D.At

A.on

B.to

C.in

D.At

Whats the meaning of "vulnerable" in Paragraph 2？

A．Easy to be influenced

B．Harmful

C．Beneficial

D．Immune

A.What

B.What's

C.Whats'

Whats the central topic of the passage？

A．Air pollution.

B．Bonfires.

C．Solid waste.

D．Bonfires and the law.

A.It's a ruler

B.What's this

C.Whats that

Whats the authors attitude towards fear according to this text？

A．Useless.

B．Helpless.

C．Conquerable.

D．Uncontrollable.