Blue whales 科普阅读 — 英语词汇题
题目
读短文，根据首字母提示补全单词。Blue whales live in the ocean. They are very b____（大的）. A blue whale can be 30 m____（米）long. They can swim fast in the sea. But now there are not many blue whales, so we must protect them. 1. b____ 2. m____