问题
选择题
His flat is ________the _______floor in a building on a busy street．
A．in, nine
B．in, ninth
C．on, nine
D．on, ninth
答案
答案：D
住在几楼要用介词on,几楼要用序数词。
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His flat is ________the _______floor in a building on a busy street．
A．in, nine
B．in, ninth
C．on, nine
D．on, ninth
答案：D
住在几楼要用介词on,几楼要用序数词。