Shirley ______ a book about China last year but I don't know whether she has finished it.
A.has written
B.wrote
C.had written
D.was writing
第8题
A.喷嘴连接松动
B.灭火器贴花标志上生产商名称、地址和电话模糊不清
C.保险装置和封记损坏
D.喷射软管连接松动
E.喷射控制枪阀门开关不灵活
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