Some of them swam ( ) A .a lot B,lots C.lots of D a lot of .选哪一个,为什么?

Some of them swam ( ) A .a lot B,lots C.lots of D a lot of .选哪一个,为什么? Some of them are some of them 为什么要用them? some of them are red.some of them are yellow. 英语翻译Dinosaurs lived on the Earth a long,long time ago.Some walk on the land,some flew in the air and some swam in lakes.Some ate meat and some ate plants.Then they all died.Why?Scientists have a lot of ideas.Here are two of them.Maybe the Ear Here are some of them. some of they还是them? Some of them 如何读? some of them怎么读 Some of them are of great some of them are of great some of them与some of which的区别是什么 some of them has还是Have? here are some photos of --- them?hers? Some of them like 什么books some of them are light yellow or some of them can be alive 翻译 some of them are woman teachers改错