Yesterday, when I went past the classroo
题型:选择题
问题:
Yesterday, when I went past the classroom, I _______ someone _______.
A.hear, singing
B.heard, singing
C.heard, sang
D.hear, sang
Yesterday, when I went past the classroom, I _______ someone _______.
A.hear, singing
B.heard, singing
C.heard, sang
D.hear, sang