You’ll never learn to ride a bicycle if you don’t ________.

A．practice

B．drill

C．train

D．exercise

A．practice

B．drill

C．train

D．exercise

14 years ago, the nine million citizens of London heard sirens(警报)all over the town. Emergency services, the fire brigade, the ___1___, hospitals and ambulances stood by, ready to go ___2___ action. In railway and underground stations, people ___3___ posters and maps telling them ___4___ to go and what to do in the emergency. This was ___5___ Flood-call. London wasn’t flooded yet. But it is ___6___ that it will be. In 1236 and 1663．London was badly flooded．In1928, many people ___7___ in Westminster, the heart of ___8___ , frowned in floods. And in 1953, 100 people living on the eastern edge of the London suburbs were___9___ again in the floods.___10___, the Greater London council(会议) is taking action to ___11___ this terrible accident happening again. ___12___ the flood wall will not be built until the 1980s. And in the meantime, Londoners ___13___ be prepared．When it ___14___, 50 underground stations will be ___15___ water. Electricity, gas and phone services will be out of ___16___.  Roads will be impossible. It will be impossible to___17___ any of the bridges between North and South London.  Imagine—London ,will ___18___ like Venice.

　　  But the Flood-call didn’t ___19___ panic(惊慌) among Londoners. Most people knew it was just a___20___ One comment from a lady who was walking along the Embankment when the sirens sounded was,“It’s a flood warning, isn’t it? The water doesn’t lock high tome.”

1．A．Londoners

B．police

C．doctors

D．nurses

2．A．up

B．into

C．to

D．it

3．A．saw

B．put up

C．received

D．read

4．A．when

B．what

C．where

D．why

5．A．Exercise

B．Train

C．Drill

D．practice

6．A．impossible

B．necessary

C．possible

D．unnecessary

7．A, living

B．staying

C．lived

D．stayed

8．A．England

B．Europe

C．London

D．world

9．A．saved

B．killed

C．in danger

D．safe

10．A．Then

B．Later

C．At last

D．In the future

11．A．prevent

B．make

C．help

D．control

12．A．And

B．Now

C．So

D．But

13．A．would

B．must

C．could

D．ought

14．A．starts

B．begins

C．happens

D．takes place

15．A．below

B．above

C．under

D．in

16．A．water

B．city

C．action

D．houses

17．A．cross

B．across

C．pass

D．past

18．A．look

B．sound

C．see

D．hear

19．A．take

B．get

C．cause

D．make

20．A．proposal

B．warning

C．joke

D．game

　　  But the Flood-call didn’t ___19___ panic(惊慌) among Londoners. Most people knew it was just a___20___ One comment from a lady who was walking along the Embankment when the sirens sounded was,“It’s a flood warning, isn’t it? The water doesn’t lock high tome.”

1．A．Londoners

B．police

C．doctors

D．nurses

2．A．up

B．into

C．to

D．it

3．A．saw

B．put up

C．received

D．read

4．A．when

B．what

C．where

D．why

5．A．Exercise

B．Train

C．Drill

D．practice

6．A．impossible

B．necessary

C．possible

D．unnecessary

7．A, living

B．staying

C．lived

D．stayed

8．A．England

B．Europe

C．London

D．world

9．A．saved

B．killed

C．in danger

D．safe

10．A．Then

B．Later

C．At last

D．In the future

11．A．prevent

B．make

C．help

D．control

12．A．And

B．Now

C．So

D．But

13．A．would

B．must

C．could

D．ought

14．A．starts

B．begins

C．happens

D．takes place

15．A．below

B．above

C．under

D．in

16．A．water

B．city

C．action

D．houses

17．A．cross

B．across

C．pass

D．past

18．A．look

B．sound

C．see

D．hear

19．A．take

B．get

C．cause

D．make

20．A．proposal

B．warning

C．joke

D．game