the little boy thought hard,then he-----ideaa.have a b.has an c.had a d.had an

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thelittleboythoughthard,thenhe-----ideaa.haveab.hasanc.hadad.hadanthelittleboythoughthard,thenhe----

the little boy thought hard,then he-----ideaa.have a b.has an c.had a d.had an
the little boy thought hard,then he-----idea
a.have a b.has an c.had a d.had an

the little boy thought hard,then he-----ideaa.have a b.has an c.had a d.had an
选D
though所以过去是had
idea第一个字母为元音
所以是an

选D
小男孩努力的思考,终于有了个主意
时态上与thought对应用一般过去时

选 D;但是,这个句子最自然的形式应该是:the little boy thought hard,and then he came up with an idea (:

选D