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.
#18252
A
abrupt
B
alternative
C
authentic
D
abstract
推荐题目
All men are created _________and we must enjoy _________right and chances in everything.
#20713
A
fair;same
B
similarly;fair
C
equal;equal
D
fairly;equal
______ with it, the worried person at last smiled.
#17871
A
Satisfied
B
Satisfying
C
Having satisfied
D
Being satisfying