單項選擇Whenwemeetwithdifficultproblems,ourteacheralways

問題詳情：

單項選擇

When we meet with difficult problems, our teacher always ______ us to work them out by ourselves.

       A. makes  B. lets  C. has  D. encourages

【回答】

D

知識點：動詞和動詞短語

題型：選擇題