The birds in the cage long for_______(free)

are the birds in the yellow birds in the tyee there are many birds in the sky Birds fly in the sky的意思 there are three birds in the why do birds south in the winter? He see two birds in the tree. Fish live in the river and birds live in the There are several birds in the tree.There are ()() birds in the tree. 英语翻译Cre activation induces loss of Dicer in CAG-CreERt:Dicerfl/fl mice.Tamoxifen treatment of CAG-CreERt:Dicerfl/fl mice activated Cre recombinase,under the control of the estrogen promoter.机器翻的自己走. The birds are singing in the tree.对singing提问 Look,the birds ______(sing) in the tree. The birds (are singing) in the tree括号部分提问 The birds are singing in the trees.翻译 适当形式填空 Listen,the birds in the tree (sing) Listen,the birds ________________ (sing) in the tree look,the birds can -----(fly)in the sky.动词形式 Where are the birds?---(In the picture.) 考点是什么?