—How do you know that she likes singing?
题型:选择题
问题:
—How do you know that she likes singing?
—I often hear her ________ in the morning.[ ]
A. to sing
B. sang
C. sing
—How do you know that she likes singing?
—I often hear her ________ in the morning.[ ]
A. to sing
B. sang
C. sing