HE WAS SICK YESTERDAY, ________ HE DIDN’T GO TO SCHOOL. A. SINC...

3. - DE KIEM TRA ANH VAN K9 BAI SO 2 HKI DOC
Tiếng Anh DE KIEM TRA ANH VAN K9 BAI SO 2 HKI DOC

3. He was sick yesterday, ________ he didn’t go to school.

A. since B. because C. so D. but