31. Although punctual himself,the professor was quite used ______late for his lecture. A) to have students B) for students' beingC) for students to be D) to students' being

熱心網(wǎng)友

D 前半句說教授自己很守時的　athough表讓步　后面就是轉折的含義了但教授很習慣學生來他的講座時遲到be used to sth(doing something)是搭配　students' being late　就是所有格動名詞的詞組

熱心網(wǎng)友

Dbe used to doing是習慣于某事。