The migratory birds use the same nests year after year,（ ）new material each time.

单选题

The migratory birds use the same nests year after year,（ ）new material each time.

答案解析

单选题

Jim knows about birds well. He can_______ the songs of most birds.

答案解析

问答题

The calim that all birds can fly is ﹍.

答案解析

单选题

A（n） ___ five years ago, Pangkor boasted sweet-singing birds. Now the jungle is being cut down.

答案解析

单选题

If you live in the country or have ever visited there, ____ are that you have heard birds singing to welcome the new day.

答案解析