6. 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.
#20934
A
primary
B
alternative
C
instant
D
unique
推荐题目
She was more headstrong than ______.
#20478
A
the rest of us
B
us the rest
C
the other of us
D
us the other
The melon the Smiths served at dinner would have tasted ________ if it had been put in the fridge for a little while.
#20780
A
good
B
better
C
best
D
well
The passer-by jumped into the cold water to save the _____ boy, who cried for help, but it was too late and the boy was _______ at last.
#19055
A
drowning; drowned
B
drowned; drowning
C
drowning; drowning
D
drowned; drowned
In aerospace devices the weight of the necessary power producing equipment is _____.
#20509
A
vital
B
possible
C
capable
D
reliable
This is by far ______movie that I have ever seen.
#18104
A
an inspiring
B
a much inspiring
C
the most inspiring
D
the more inspiring