MY MOTHER TOLD ME SHE _______ VERY TIRED SINCE SHE CAME BACK FROM A VISIT TO OURGRANDPARENTS

4/ - SACH BT ANH 10 CO DAP AN
SACH BT ANH 10 CO DAP AN

4/ My mother told me she _______ very tired since she came back from a visit to our

grandparents.

A. was B. had been C. is D. has been