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is looking for has looked has been looking for had looked
has left has moved away has been away from left
It ________3 years since he ________Wuhan.A. is; left is; has been away from was; had left has been; has left
has heard from; that was heard from; that has been heard from; why heard from; why
A. Judge by Judged by Judging from To judge from
has heard from; that was heard from; that has been heard from; why heard from; why
has been away has left has been away from left
has been out of work was out of work has lost his work had left from his work
suffered from has suffered from suffers from were suffering from
has been prevented had been prevented is prevented was prevented
has left has been away from have been away has been left
has heard from; that was heard from; that has been heard from; why heard from; why
where he has been where he has gone where he goes where he is from