Listen ! They ____( sing ) in the classroom .
举一反三
- Listen！Some girls _______________ ( sing)in the classroom .
- Listen!Joan__________(sing)intheclassroom.Sheoften__________(sing)there.
- Listen! She____in the classroom. A: is singing B: sing C: to sing D: is sing
- Listen! The birds ____(sing)
- listen! Some girls in the classroom. A: are singing B: sing C: is sing