单选题 I could help him with that, but I would sooner he ______ it by himself.
【正确答案】 B
【答案解析】此题考查虚拟语气。在含有would sooner和had rather的句子中要用虚拟语气，但是不用should do的形式，而是要根据具体情况选用动词的过去式或者过去完成式。