单选题 Conditions on the noisy hallway were not at all conducive to sleep.

【正确答案】 B

【答案解析】[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(to do sth.)有助于……的。(be)beneficial(for sb./to sth.)有益于……的。dutiful尽职的；守本分的。