I __ you last night ,but I forget.A.may telephone B.should t

I __ you last night ,but I forget.A.may telephone B.should telephone C.should have telephoned
D.might telephoned
Mrs.Smith with her two daughters often __ to the supermarket on Sundays.
A.go B.is going C.goes D.going
Class was __ and all the student left the school.
A.off B.over C.on D.away
请各位热心的网友大哥大姐帮忙解答 主要不在答案 希望在各位大大的讲解下下次再遇到可以答对.小白在此谢过