单选题 We are to ______ 10,000,000 computers next year to meet the market requirements.
【正确答案】 B
【答案解析】[解析] 动词词组辨析。turn in“交出;上床睡觉”;turn out“证明是,结果是,生产”;turn up“出现,发生”;turn to“变成,求助于;翻到”。根据句意,空后内容只能是被证明出来的。故答案为B。