—______ did your sister leave China?
—She______ for three years .
A.When, has left | B.When ,has been away |
C.How long,has left | D.How long,has been away |
—______ did your sister leave China?
—She______ for three years .
A.When, has left | B.When ,has been away |
C.How long,has left | D.How long,has been away |