A landing on Mars is within the _____ of current physical theory.
#6916
A
scheme
B
scope
C
scrap
D
scale
推荐题目
The speech from the new government is a _______ that major changes are on the way.
#5192
A
warning
B
symbol
C
goal
D
signal
You’ve just missed your ______, and you will have to wait for the next round.
#7423
A
chance
B
turn
C
time
D
round
The invention of the typewriter was a great_______ to communication and printing.
#6407
A
contribution
B
devotion
C
revolution
D
construction
We should develop the sunshine project actively, because it can save _______ resources as well as reduce pollution.
#5788
A
power
B
strength
C
force
D
energy