In winter ( ) do not fly south
In winter ( ) do not fly south
what in the winter do not fly south?
why do brids fly south in the winter?
Why do birds fly south for winter
riddle:why do birds fly south for winter
In winter ,some birds_____the south.A.fly to.B
why do birds south in the winter?
谁能用英语回答这个脑筋急转弯的问题呢why do birds fly south in the winter
In winter ,some birds fly to the south 为什么要用fly啊.
Swallows fly to the south before winter ( )
why do swan fly south?
The climate in south in winter is not as cold as_____ A in B