填空题 They are going to have the serviceman installed an electric fan in the office tomorrow.
【正确答案】
【答案解析】installed应改为install[解析] 本题主要考查have sb. do(叫/让/使某人做某事)的用法。注意不要与have sth. done(让/叫/使/请别人做某事)的用法相混淆。