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
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As _____ city with rich culture, Shanghai is ______ home to a number of artists who are determined to establish their own style.
#8316
A
the; the
B
a; the
C
a; /
D
a; a
A recent study has come up with _____ unexpected conclusion that ____ Africa elephants should be divided into two different species.
#8544
A
a, the
B
an, the
C
an, an
D
the, the
In 1948, three American scientists invented ____ transistor, which is ____ small electronic device to control an electric current.
#8790
A
the; a
B
a; a
C
the; the
D
a; the
Itis ____ short distance from here to _____ shopping center, so you can walk there if you like.
#9023
A
不填; 不填
B
a; 不填
C
the; the
D
a; the