问题
选择题
In communication, a smile is usually strong sign of a friendly and open attitude.
A．the; /
B．a; an
C．a; /
D．the; an
答案
答案：C
本题考查冠词。a + adj. +sign of 意为一个……样的标志；attitude为不可数，故选C。
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In communication, a smile is usually strong sign of a friendly and open attitude.
A．the; /
B．a; an
C．a; /
D．the; an
答案：C
本题考查冠词。a + adj. +sign of 意为一个……样的标志；attitude为不可数，故选C。