—No wonder he ______perfect English.
A:had taught; spoke
B:taught; speaks
C:is teaching; has spoken
D:has been teaching; will speak
中国旅游研究院最近发布报告称,2012年中国出境旅游人数8200万人次,8200万用科学记数法表示为( )
—I don't want to eat _____ , Mom. I'm not feeling well.