he__a book about china last year ,but i don't know if he___ita.wrote,has finishedb.was writing ,will finishc.was writing ,has finishd.wrote ,will finish

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he__abookaboutchinalastyear,butidon''tknowifhe___ita.wrote,hasfinishedb.waswriting,willfinishc.waswri

he__a book about china last year ,but i don't know if he___ita.wrote,has finishedb.was writing ,will finishc.was writing ,has finishd.wrote ,will finish
he__a book about china last year ,but i don't know if he___it
a.wrote,has finished
b.was writing ,will finish
c.was writing ,has finish
d.wrote ,will finish

he__a book about china last year ,but i don't know if he___ita.wrote,has finishedb.was writing ,will finishc.was writing ,has finishd.wrote ,will finish
选A.wrote,has finished.因为,是去年“last year ”写的,要用写 write 的过去式 wrote.后半句表示“不知道是否完成”,用现在完成时态,所以是：“have+ 动词的过去分词”,由于主语是he,是第三人称单数,用has,因此用 has finished
填写第二个空,所以选择A
补充：不选择D是因为,如果选择D意思就是：我不知道他是否会写完这本书,这在逻辑意义上和前半句不符合,所以不选择D.

他去年开始写一本关于中国的书，但我不知道他是否已经写完。
因为有last year，所以只能用过去时，不能用过去进行时。
选项D用了将来时，肯定不对。
所以只能选A

此处你用worte的话，那么就表示这本书已经完成了，与last year这个过去时间符合，但是后面说了我不知道她是否已经写完了，所以后面的就不符合了。start一般只

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