Asanexcellentandhard-workingteacher,Mr.Wangalwaystriesh...

問題詳情：

As an excellent and hard-working teacher, Mr. Wang always tries his best _____ the questions his students ask.

         A. answer                      B. answers                       C. to answer

【回答】

C

知識點：非謂語動詞

題型：選擇題