( )What's the time___your watch A.at B.by C.on D.with

( )What's the time___your watch A.at B.by C.on D.with
( )What's the time___your watch A.at B.by C.on D.with

( )What's the time___your watch A.at B.by C.on D.with
B
固定用法

by
你手表上现在是几点（估计他自己的手表坏了）