Inthereadingroom，youshouldwalkon       tiptoesothatyouw...

問題詳情：

In the reading room，you should walk on        tiptoe so that you wouldn’t disturb other  readers,

    A the；the           B，the；／         C．／；the            D，/，/

【回答】

知識點：冠詞

題型：選擇題