ⅰ．单项填空
1．that she hadn’t kept her ________ on her work resulted in the failure．
a．head b．heart c．brain d．mind
2．many people have been ill from a strange disease these days，________ we’ve never heard of before．
a．it b．that c．one d．this
3．—is china daily ________ here at your book stall?
—sorry，it has been sold out．
a．suitable b．available
c．precious d．convenient
4．not until midnight ________ back from company，drunken．
a．he did come b．he came
c．didn’t he come d．did he come
5．since david ________ downloaded a virus into his computer，he can not op资源难易程度:★★★★★★★★★★★★★★★
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