1. ----- Is there anything else to discuss?
------ _________, I guess.
A. Not at all B. No ,that's all C. Yes , I 'm sure D. Yes , of course
2. The development of industry has been _______ gradual process throughout ______human existence from stone tools to modern technology.
A．不填； the B．the；a C． a；不填 D．a；a
