．The development of industry has been________gradual process throughout________human existence，from stone tools to modern technology. (2012·浙江，2)
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/；the
B
the；a
C
a；/
D
a；a
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China's economy and financial market will be on steady path in 2014, Premier Li Keqiang said on Friday during trip to Tianjin．
#7971
A
a; a
B
the; a
C
a; 不填
D
the;不填
There was __________ time when the two countries were at __________ war.
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the; /
B
the; the
C
a; /
D
a; a
Scarlett Johnasson developed ______ interest in acting at three and has made herself perhaps ______ finest actress of her generation.
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A
an; a
B
/; the
C
an; the
D
/; a
.—Was _________________ problem solved? —We were trying to think of _________________ way out, but it was difficult to find one.
#9917
A
a; a
B
a; the
C
the; a
D
the; the