— No.They _____ to London on business.
-- He San shui Park.
句中的should have asked是"情态动词+现在完成时",表示过去本应该做某事,事实上没有做。
如:She Beijing. 她本应该去了北京。(没有去)
— No. They to London on business.
—Never. I hope to visit it soon.
—Yes. My dad _______ Hangzhou on business.
— Yes, and I will be back next month.
B: Sorry, I don't. But I think he ___the library.