用动词的正确形式 I (read) this story before. But I (now know) the writer.

问题描述:

用动词的正确形式 I (read) this story before. But I (now know) the writer.

read,didn't know
第二个空中应该是(not,know)吧,这句话的意思是 我原来读过这本书,但是我不知道作者是谁.原来发生的事情应该用过去式.