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
The beautiful scenery in Switzerland is very ________to the tourists from the whole world.
#19121
A
grateful
B
attractive
C
valuable
D
popular
Milu deer，which used to be ______ in China long ago，is a rare animal nowadays.
#18441
A
ordinary
B
common
C
popular
D
usual
This bird is really lovely， and I’ve never seen ______ one.
#20665
A
a finer
B
a finest
C
the finer
D
the finest
She has already tried her best. Please don’t be too ______ about her job.
#18747
A
curious
B
special
C
particular
D
responsible
It was pretty _______ from her voice that she was playing a trick on all of us.
#19093
A
curious
B
obvious
C
religious
D
energetic