Usually a meteorological observatory (气象台) _____ air quality in urban areas from one to five: excellent, fairly good, slightly polluted, poor, and dangerous.
#13189
A
identifies
B
purifies
C
classifies
D
clarifies
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A huge _____ of quilts was needed in Qinghai province since it was freezing at night.
#14460
A
number
B
plenty
C
quantity
D
quality
It’s reported that the United States uses______ energy as the whole of Europe.
#14166
A
as twice
B
twice much
C
twice much as
D
twice as much
Old-fashioned phones matter when wireless networks _____in disasters.
#13847
A
turn down
B
turn out
C
break down
D
break out
After the earthquake, the president _____ a three-day period of mourning, the first-ever event of its kind for ordinary people.
#12427
A
suffered
B
declared
C
confirmed
D
informed
The bush fire ________ fierce heat and the villagers nearby had to flee.
#11981
A
set up
B
sent away
C
gave off
D
made out