问题
选择题
______ both sides accept these terms will everlasting peace be established in this region.
A．Unless
B．As long as
C．If only
D．Only if
答案
答案：D
Only+状语位于句首主句要倒装。A. Unless 除非 B. As long as 只要 C. If only 如果…就好了 D. Only if 只有… 句意：只有双方接受这些条款永久的和平才能在此地区实现。 选D