．The development of industry has been________gradual process throughout________human existence，from stone tools to modern technology. (2012·浙江，2)
#7774
A
/；the
B
the；a
C
a；/
D
a；a
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New iPhone goes on sale on Friday with ________ bigger screen and 4G wireless technology, as ________ company seeks to keep its competitiveness.
#8203
A
a ; a
B
a ; the
C
the ; the
D
the ; a
In communication, a smile is usually _____ strong sign of a friendly and _____ open attitude.
#9454
A
he; /
B
a; an
C
a; /
D
the; an
Shangri-la is really ____ beauty, which is _____ home to many kinds of rare birds and animals.
#8702
A
a; a
B
/；the
C
a; /
D
/; /