Some people are walking the bridge and some boats are going the bridge. A. across acro

问题补充：

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：

A. across, across

(答案→)B. over, through

C. through, through

D. through, over

解析：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。