Choose the proper word for each sentence and fill in the blanks with its proper form or derivative. 1. The cliff was ________ in mist. 2. The car behind was ________ at me. 3. The wind ________ through the trees. 4. He had the audience ________ with laughter. 5. She has outstanding powers of ________. 6. “How dare she,” he ________ under his breath. 7. The incident has always been ________ in mystery. 8. The suggestion was greeted by ________ of laughter. 9. The fog rolled in, and a grey ________ covered the city. 10. He began by making a few general ________ about the report. observation (2 sentences ; n. 观察 /v. 评论 ) hoot (3 sentences; v. 高声大笑 /v. 鸣喇叭 /n. 前两个义项的名词 ) shroud (3 sentences; n. 裹尸布 , 全覆盖物 /v. 覆盖 , 笼罩 /v. 前一个义项的比喻义 , 将 ... 保密 ) mutter (1 sentence; v. 咕哝 , 低声含糊地说 ( 通常带抱怨情绪 )) murmur (1 sentence; v. 低声说;发出轻柔持续的声音 )