语法与词汇 18.Conditions on the noisy hallway were not at all conducive to sleep.

【正确答案】 B

【答案解析】句意：走廊里吵吵闹闹，对入睡毫无帮助。conducive有助于……的。(be)helpful(todo sth．)有助于……的。(be)beneficial(for sb．／to sth．)有益于……的。dutiful尽职的；守本分的。