—Inschoolweteachersnevergiveachildachancetodiscoverhis...

問題詳情：

 —In school we teachers never give a child a chance to discover his mistakes. We do it all for him.

   —Exactly. We act as if he will never notice a mistake ______ it is pointed out to him.

       A. if                          B. unless                      C. after                        D. though

【回答】

B

知識點：連詞

題型：選擇題