27. (2018荆门)—Would you like to go swimming in the river, John?
—Swim? Sorry, our teachers always tell us ________ in the river alone.
A. don't swim  B. to not swim  
C. not swimming  D. not to swim
27. D【解析】考查动词不定式。句意“约翰，你想去河里游泳吗？”“游泳？对不起，我们的老师总是告诉我们不要独自到河里游泳。”根据常识可知，老师总是告诉我们不要独自去河里游泳。tell sb.to do sth.告诉某人去做某事，其否定形式为tell sb. not to do sth.。故选D。