When I tried to find _________that prevented so many people from taking part in the program, it seemed to me that there were two main reasons．
| A．why it did | B．that it did | C．what it was | D．why it was |
相关试题
Most of the professors _____ to our school were from South Africa．
| A．invited | B．to be invited | C．being invited | D．had been invited |
—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 |
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．fo rever |
—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 |
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