is, be, were; will rise, would rise, have risen If the earth _________to rotate in the opposite direction, the sun _________ in the west.
is, be, were; will rise, would rise, have risen If the earth _________to rotate in the opposite direction, the sun _________ in the west.
【正确答案】:were,would rise
【题目解析】:条件从句和主句都是虚拟语气,条件从句用过去时,主句用would do .
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