We are enjoying the birds( ).(sing)

We are enjoying the birds( ).(sing) We are enjoying the birds .(sing) The birds are pretty 和 Birds sing有什么区别? ____ are the birds doing?The birds are sing in the tree.选Whe In spring,we can hear birds -----(sing) in the trees 单项选择:The birds are _____ in the _____.A.sing;tree B.to sing; 连词成句 we,a,enjoying,the,lot,are,party these birds are fun (watch) there are many birds ( ) (sing) We often hear a lot of birds ___(sing) in the trees in the m the birds sing to welcome the spring the children enjoy the birds [ ] [sing] Listen!There are some birds ____ in the tree.(用sing的适当形式填空)怎