题目内容
A new ________ bus service to Tianjin Airport started to operate two months ago.
A. normal B. usual C. regular D. common
C
解析:
normal正常的( normal temperature, return to normal); usual通常的(usual time, usual restaurant); regular定时/期的,有规律的(regular breathing; a regular bus service ); common一般的,常见的(common sense, common names)。
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