单项选择题A．for the train to startB．the train startingC．the train startD．for the train starting

单项选择题A．what he is likeB．what is he likeC．how he isD．how is he

单项选择题A．had been workingB．have been workingC．workedD．have worked

单项选择题A．There wasB．There isC．It'sD．It was

单项选择题A．mend me the watchB．mend me my watchC．have my watch mendedD．have mended my watch