The drilling in Antarctica dragged on slowly because of lack of money, equipment breakdowns, environmental ______ and severe cold.
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A
concerns
B
assumption
C
occupations
D
ignorance
推荐题目
Radar enables the pilot of an airliner to take off, fly and land in _____.
#6926
A
danger
B
comfort
C
continuity
D
safety
Never judge a man by his _____ alone — you might be fooled by what he looks like.
#5515
A
character
B
appearance
C
intelligence
D
application
His name is on the _______ of my tongue, but I just couldn’t remember it.
#6877
A
tip
B
top
C
side
D
end
Some countries are increasing their use of natural gas, and other forms of __________.
#6414
A
source
B
energy
C
power
D
material
We will be given a(n) to ask questions at the end of the lecture.
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A
presentation
B
explanation
C
opportunity
D
possibility