题目:
The public transportation in this city is very convenient, where many buses run ______.
A.occasionally
B.approximately
C.immediately
D.frequently
答案:
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答案:A题目分析:句意:当被要求解释是什么让他的课使学生这么兴奋的时候,这个老师保持沉默。这句话中explain后面是宾语从句,宾语从句后缺成份,并且是做主语的物(做主语、宾语、表语,),那要用what引导(如...