问题
单项选择题
His salary as a driver is much higher than（）.
A.a porter
B.is a porter
C.that of a porter
D.as a porter
答案
参考答案：C
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His salary as a driver is much higher than（）.
A.a porter
B.is a porter
C.that of a porter
D.as a porter
参考答案：C