As there is less and less coal and oil, scientists are exploring new ways of making use of ____ energy, such as sunlight, wind and water for power and fuel.
#18985
A
original
B
alternative
C
convenient
D
staple
推荐题目
---How do you like the film?---There was nothing special--- it was only ____.
#20695
A
average
B
usual
C
normal
D
common
The workers insist that the company should take _____ measures to improve their working condition.
#18998
A
attractive
B
effective
C
impressive
D
conservative
Come and see me whenever________________.
#18325
A
it is convenient for you
B
it will be convenient for you
C
you are convenient
D
you will be convenient
The employees were tired of working ______ hours and some of them even gave up their work.
#18245
A
special
B
extra
C
especial
D
spare
This year they have produced_________ they produced the year before last.
#19899
A
twice many cars as
B
twice as many cars as
C
twice more than cars
D
twice the cars of