【安徽蚌埠三中第一次质检】13. ______ two exams to worry about, I have to work really hard this weekend.
A. With B. As C. As for D. Because
【答案】A
【安徽师大附中一模】21. The voyages of travellers before the 17th century show that they were not ________ the sea even though they didn’t have modern navigational aids.
A. at the expense of B. at the risk of C. in the way of D. at the mercy of
【答案】D
【解析】考查介词短语的含义。此处at the mercy of意为：任由。。。摆布。句意：17世纪前的航海表明尽管当时没有现代化的航海辅助系统他们也不任由大海的摆布。
