Anna()read when she was four1can2is able to3could4were able to请选择答案及为什么谢谢

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Anna()readwhenshewasfour1can2isableto3could4wereableto请选择答案及为什么谢谢Anna()readwhenshewasfour1can2isable

Anna()read when she was four1can2is able to3could4were able to请选择答案及为什么谢谢
Anna()read when she was four1can2is able to3could4were able to请选择答案及为什么谢谢

Anna()read when she was four1can2is able to3could4were able to请选择答案及为什么谢谢
3 could
1是现在时,与后面从句不符合
2.同上
4.were不对,如果是was就可以

could
can,is able to 为现在时态,与后面从句的时态不一致。
were able to 中的were与主语不一致。
祝你进步!