Only ______a long growing period can large plants exist.a.there is whereb.is there wherec.where is thered.where there is我选的A .错在哪里呢 ..但不理解.

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Only ______a long growing period can large plants exist.a.there is whereb.is there wherec.where is thered.where there is我选的A .错在哪里呢 ..但不理解.

Only ______a long growing period can large plants exist.a.there is whereb.is there wherec.where is thered.where there is我选的A .错在哪里呢 ..但不理解.
Only ______a long growing period can large plants exist.
a.there is where
b.is there where
c.where is there
d.where there is
我选的A .错在哪里呢 ..但不理解.

Only ______a long growing period can large plants exist.a.there is whereb.is there wherec.where is thered.where there is我选的A .错在哪里呢 ..但不理解.
only 引导一个从句,从句成分位置不用调换,而主句就要部分倒装.看到后面有个can吗?那就是主句了,"can large plants exist"这是主句.
特殊疑问词一般都要放在句首

倒装的英语题目疑问代词与疑问副词要提前,“where”是疑问副词,所以先排除A,B。疑问句在复合句中要用陈述语气