Wecanneverexpectbluerskyunless

We can never expect____bluer sky unless we create____ less polluted world.

A．a; a	B．a; the
C．the; a	D．the; the

登录免费查看答案和解析

相关试题

No matter how frequently __________, the works of Beethoven still attract people all over the world.

A．performed	B．performing
C．to be performed	D．being performed

收藏答案/解析

There have been several new events __________ to the program for the 2008 Beijing Olympic Games.

A．add	B．to add
C．adding	D．added

收藏答案/解析

— There is a story here in the paper about a 110-year-old man.
— My goodness! I can’t imagine __________ that old.

A．to be	B．to have been
C．being	D．having been

收藏答案/解析

Whenever he was asked why he was late for class, he would answer carelessly, always __________ the same thing.

A．saying	B．said
C．to say	D．having said

收藏答案/解析

A good story does not necessarily have to have a happy ending, but the reader must not be left __________.

A．unsatisfied	B．unsatisfying
C．to be unsatisfying	D．being unsatisfied

收藏答案/解析