．We can never expect _________ bluer sky unless we create ________

．We can never expect _________ bluer sky unless we create _________ less polluted world.

#7748

a；a

a；the

the；a

the；the

推荐题目

-----How about _______ Christmas evening party? ----- I should say it was _______ success.

#9134

a, a

the, a

a, \

the, \

If you sit near       front of the coach, you’ll have        better view.

#9220

不填；the

不填；a

the; a

the; the

Jumping out of _______ airplane at ten thousand feet is quite _______ exciting experience．

#8954

an; an

不填; an

不填; the

the; the

— Is Mr Smith rich?  — Yes, very rich. When he worked in ________town, he earned a lot. Now he has a big farm in ________ country.

#9998

at; the

/; /　　　　　　

/; the

the; /

The Shanghai World Expo is intended to achieve our common goal,      world that is safer, cleaner and healthier than      one we’re living in.

#8815

the, the

a, /

a, the

the, /

共2943题