The fact showed that the voyages of travelers before the 17th century 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
The fact showed that the voyages of travelers before the 17th century 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
D