问题
选择题
People are living in ___ world where mouse clicks rule our life, so online searches have become _____ must.
A．the; /
B．/; a
C．a; a
D．a; the
答案
C
考查冠词。句中live in a world…生活在一个……的世界。become a must变成一件必需品，选C。
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