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
推荐题目
The discovery of the new drug is of great ____ to people who suffer from heart problems.
#12293
A
appreciation
B
significance
C
satisfaction
D
guidance
Some people are good at _____ voices on the phone while others ______.
#12263
A
knowing; aren’t
B
recognizing; don’t
C
knowing; don’t
D
recognizing; aren’t
He was such __ good speaker that he held our attention every minute of __ three-hour lecture.
#11278
A
/; the
B
a; /
C
a; the
D
a; a
She _____ the children round him and asked them to listen to her attentively.
#14449
A
gathered
B
collected
C
told
D
drew