看图片,从方框中选择合适的词填到横线上。
am/ is → was; are → were; can → could
big → bigger; small → smaller
eat → ate; run → ran; drink → drank
There lots of dinosaurs many years ago.
Some of them plants. Some of them faster, so they could eat other dinosaurs. But now we only see dinosaurs in museums.
答案:【1】were【2】ate【3】ran【4】smaller【5】can