问题
单项选择题
Tom（）since he lost his job three weeks ago.
A.has employed
B.was unemployed
C.had been unemployed
D.has been unemployed
答案
参考答案：D
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Tom（）since he lost his job three weeks ago.
A.has employed
B.was unemployed
C.had been unemployed
D.has been unemployed
参考答案：D