What's the time____your watch It's 7:30.It's time_____go to schoolA.by inB.with onC.by to单项选择,说出为什么

What's the time____your watch It's 7:30.It's time_____go to schoolA.by inB.with onC.by to单项选择,说出为什么
What's the time____your watch It's 7:30.It's time_____go to school
A.by in
B.with on
C.by to
单项选择,说出为什么

What's the time____your watch It's 7:30.It's time_____go to schoolA.by inB.with onC.by to单项选择,说出为什么
C.by to
你手表几点了?7：30了.该上学了.
问别人手表几点都用介词by
it's time to do sth.应该.；是做.的时间了