How long has Mrs.Zhang been in Italy?It __ half a year since she __ there.How long has Mrs.Zhang been in Italy?It __ half a year since she __ there.A:is,moved B:was,moved C:was,has moved D:has been ,has moved

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How long has Mrs.Zhang been in Italy?It __ half a year since she __ there.How long has Mrs.Zhang been in Italy?It __ half a year since she __ there.A:is,moved B:was,moved C:was,has moved D:has been ,has moved
How long has Mrs.Zhang been in Italy?It __ half a year since she __ there.
How long has Mrs.Zhang been in Italy?It __ half a year since she __ there.
A:is,moved B:was,moved C:was,has moved D:has been ,has moved

How long has Mrs.Zhang been in Italy?It __ half a year since she __ there.How long has Mrs.Zhang been in Italy?It __ half a year since she __ there.A:is,moved B:was,moved C:was,has moved D:has been ,has moved
A.现在完成时结构:It has been + 时间段+since+一般过去时...
=It is + 时间段+since+一般过去时.