listen!There is a bird _____ in the tree.A. is singing B. sings C. singing
—Where __________ you find your ticket? —I __________it on the ground.
—Is ______ here? ---No, Tom isn’t here. But it’s time to have class.
He turned around, but he couldn't see_______.
Yesterday I saw Amy ____________.
It is terrible. The cat miaowed a lot at night recently. It _________ a baby crying.