the traffic was quite light,so we soon arrived in london,此处的light怎么理解?

yesterday,heavier,was,than,traffic,the(.); testerday,traffic,was,heavier,than,the,morning(.) she was going to quit the job.为什么用WAS 过去式当BE动词? 1 years ago,Shanghai was a smaii town 2 the East China Sea.Only a few thousand people lived here.Many people were 3 that were very poor.There were no tall buildings,no traffic.Shanghai was very quit.Today Shanghai is a big city.It is one of the 4 imp The passenger was ______ hurt in the traffic accident.(serious) I was late because of the traffic jam对because of the traffic jam画线 She told him she was going to quit the job这是病句吗? Tina was s____ injured in the traffic accident I WAS LUCKY TO MISS THE TRAFFIC ACCIDENT 句子成分 i was held up by the traffic jam. the traffic was heavy.heavy为什么不能是busy It was carelessness that c__ the traffic accident. The___(move)of the traffic was very slow who was sent____(cover)the traffic accident yesterday The reason why he was late was that he was held up in the traffic jam. The reason why he was late was that he was held up in the traffic jam. quit the news is quit amazing I heard that the traffic there was terrible.是不是 听说 都用过去式?为啥用was?