Becky was in the bathroom.She was brushing her（1） 　 　and the tap（水龙头） was on. "Turn that tap off，" a voice came out.Becky was scared.She looked around，but saw no one. "Turn off that tap.You are （2） 　 　water!"

"Who...who are you？" Becky's voice was （3） 　 　.

"I'm a drop of water.Do you know（4） 　 　I'm from？"

"From the tap，I think，" said Becky.

"Yes.But a few days ago，I was in a cloud.Then I dropped into a river.The river（5） 　 　me to a lake.Then I travelled to your city and it was time to get cleaned up."

"Get cleaned up？" Becky asked.

"Yes.I was （6） 　 　during my journey，so they must clean me up.Then I travelled （7） 　 　the pipes（水管） under the ground.I waited there（8） 　 　you called me，and here I am.After you've finished with me，I'll g to a sewage plant（污水处理厂）.Then they'll push me into the river and I'll go（9） 　 　the sea again."

"Again？"

"Yes，So remember not （10） 　 　me of waste me!"

（1）

A．

teeth

B．

tooth

C．

feet

D．

foot

（2）

A．

waste

B．

wasting

C．

wastes

D．

wasted

（3）

A．

sweet

B．

normal

C．

tired

D．

weak

（4）

A．

which

B．

what

C．

where

D．

why

（5）

A．

carried

B．

cheated

C．

covered

D．

copied

（6）

A．

dry

B．

wet

C．

dirty

D．

clean

（7）

A．

in

B．

on

C．

under

D．

near

（8）

A．

after

B．

until

C．

though

D．

or

（9）

A．

through

B．

over

C．

across

D．

back

（10）

A．

pollutes

B．

polluting

C．

to pollute

D．

polluted