单选题 My mother is sleeping. Would you please ______ the radio?
A. turn on B. turn off C. turn over

【正确答案】 B
【答案解析】[解析] 动词词组辨析。句意为：我妈妈正在睡觉，你能把收音机关掉吗?turn on打开；turn off关上；turn over打翻，仔细考虑；另有turn up出现，到达；turn down开小，拒绝。