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
With April 18’s railway speedup, highway and air transport will have to compete with ________ service for passengers.
#20769
A
good
B
better
C
best
D
the best
The elderly need special care in winter, as they are ______ to the sudden change of weather.
#18283
A
sensitive
B
negative
C
flexible
D
sensible
）My new friend is a ____ boy.
#34908
A
fifteen-year old
B
fifteen-years-old
C
fifteen years old
D
fifteen-year-old
The president is paying a _______visit to his neighboring country.
#18072
A
private
B
single
C
individual
D
personal
A government official was murdered in his own house yesterday and the police are collecting evidence that is ______ to the case.
#19771
A
similar
B
devoted
C
relevant
D
addicted