题目内容
用正确的介词(介词词组)完成句子
There are many cars and buses ________ the bridge.
Li Lei sits ________ my left, and I am ________ his right. We are ________ ________ each other.
There is a bus stop ________ our school.
Two boats are going ________ the bridge.
Don't go swimming ________ the river. It's dangerous.
