【正文】
urs ________ (be) really small. One of the smallest dinosaurs _________ (be) about one metre long and __________ (weigh) about three kilograms. Others ________ (be) really big. Some very large ones __________ (weigh) over 100,000 kilograms and some _________ (be) about 40 metres long. read lived appeared were were didn’t live wer was weighed were weighed were Some dinosaurs ________ (eat) plants and others __________ (eat) meat, but they _________ (not eat) grass. All dinosaurs __________(have) four legs. They all _________ (live) on land. Dinosaurs __________ (lay) eggs. Some parent dinosaurs __________ (take) care of their babies, some __________ (do not). The last ones __________ (die) more than 60 million years ago. Nobody knows why.