问题
选择题
Some people are walking _______ the bridge and some boats are going _______ the bridge.
A．across, across
B．over, through
C．through, through
D．through, over
答案
答案：B
此题重点考查介词：across“穿过…的表面”，through“穿过…的内部”，over是在…上方“，句意：一些人正走过桥，一些船正穿过桥。人是在桥的上面走，穿是穿过桥的内部，选B。