If you're sitting around a lonely campfire at night, the howl of a wolf can sound pretty ______.
A、fearful
B、threatening
C、dreadful
D、frightening
【正确答案】：D
【题目解析】：译文：假如夜晚你一个独自坐在篝火旁，狼的嚎叫声让人听起来会毛骨悚然。选项D中fearful指“感到害怕的”；threatening指“威胁的”；dreadful指“糟糕的”；frightening指“令人害怕的”。答案为D。
