问题
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
B: at the risk of
C: in the way of
D: at the mercy of
正确答案是：
同类题型
I often watch TV plays. What about you—–I ______watch them. They are long and boring.
The scientists are beating their brains trying to_______ a solution to the problem.
80It was not until 1920 ______ regularradio broadcasts began
dren often form some bad habits, ____________remain withthem as ling as they live
Let’s have an outing tomorrow.— Sorry. The final exam is drawing near and I am in arace _____ time.