（2010·云南模拟）Most of the professors _____ to our school were from South Africa．
A．invited B．to be invited C．being invited D．had been invited
（2010·重庆模拟）—Alice, you look puzzled．Haven’t you understood it?
—Yes．I _____of another problem just now．
A．had thought B．have thought C．thought D．was thinking
（2010·重庆模拟）By looking at a problem in as many ways as possible, creative thinkers can find solutions that would _______ remain invisible．
A．otherwise B．yet C．already D．forever
（2010·南昌二模）—What do you think of the performance today?
—Great! but a musical genius could perform so successfully.
A．All B．None C．Anybody D．Everybody
(2010·天津模拟)Get out of here at once. _________ not, I’ll phone the police.
A. Since B. If C. Why D. When
（2010·长春模拟) she is not so cheerful she used to be?
A. How is it that；as B. Why is it that；what
C. Is it why；that D. How it is that；as
