问题
选择题
The teaching building has five floors. My classroom is ______________ the third floor.
A．on
B．in
C．at
D．to
答案
答案：A
考查介词。句意“教学楼有五层，我的教室在第三层。”在第......层，用介词on。故选A。
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The teaching building has five floors. My classroom is ______________ the third floor.
A．on
B．in
C．at
D．to
答案：A
考查介词。句意“教学楼有五层，我的教室在第三层。”在第......层，用介词on。故选A。