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【单选题】
下列金属元素中属于有害的重金属的是（）A.
Fe
B.
Al
C.
Mn
D.
Cd
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【简答题】判断正误,并作出修改。 According to me, she should have resigned earlier. She smiled friendly. He laughed silly. His father died three years before. Every children need love. All the light was out. We are alread...
【单选题】Mary is said _____ in the supermarket for 5 years, but I don't know why she resigned last month. [ ]
A.
to have been working
B.
work
C.
to be working
D.
to have worked
【简答题】Fill in the blank with the approapriate forms of the given words. She resigned for the reason that she couldn't stand the and unfriendliness on the office. (compete)
【单选题】—I haven't seen film star Sally for a long time. —She ________ the stage because she gave birth to a baby last year. [ ]
A.
resigned
B.
retired
C.
quitted
D.
abandoned
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