— Have you seen Michael recently ? — Yes, in fact I saw him this morning. I ____ him for two years. A. haven’t seen B. hadn’t seen C. didn’t see D. don
— You’ve worked there for half a year. What do you think about your boss? — He is a person who would try his best to ________ his purpose. A. accomplish B. settle C. perform
_________ is known to us all is that the old scientist, for ___________ life was hard in the past, still works very hard in his eighties. A．As; whom B．What; whom C
