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
“This book is ______ more useful for us students.” “Yes, but it is _______ too difficult.”
#20649
A
quite, quite
B
much, rather
C
rather, quite
D
quite, much
--- It was said that little Bill hit his classmate on the head.---He is thought to be a(an )________ boy, who is always ready to start a fight.
#19424
A
ashamed
B
awkward
C
desperate
D
aggressive
His girl friend wore a smile when seeing the nice dress she wanted.
#19149
A
satisfied
B
satisfying
C
being satisfied
D
satisfy[
(2013·高考福建卷)The Forbidden City attracts a ________ stream of visitors every day，especially during national holidays.
#17831
A
constant
B
main
C
powerful
D
shallow
He told me that in the following days there were other changes, even more _________.
#19420
A
abrupt
B
changeable
C
suitable
D
typical