—Havetheyvisitedthezoomanytimes. —

来源：语文精选馆 1.06W

—Have they visited the zoo many times.

—______________. Only once.

A. Yes, they have B. No, they haven’t C. No, they have

【解析】：此题重点考查现在完成时的简略回答，根据答语可知应用否定*回答。