Anna _ able to read when she was four.A:can B:could C:is able to D:were able to选哪一个

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Anna_abletoreadwhenshewasfour.A:canB:couldC:isabletoD:wereableto选哪一个Anna_abletoreadwhenshewasfour.A:

Anna _ able to read when she was four.A:can B:could C:is able to D:were able to选哪一个
Anna _ able to read when she was four.A:can B:could C:is able to D:were able to
选哪一个

Anna _ able to read when she was four.A:can B:could C:is able to D:were able to选哪一个
应该是：Anna __was__ able to read when she was four.
答案貌似都不对呀~~~~前后应该都是过去时

c be able to 的用法

was able to read
是正确的答案

was