Listen! Is Kate playing the piano in the room —No. It _________ be her. She has gone to London with her parents.

The detective and his assistant have begun to the mysterious murder.

Could you please ________ your schoolbag It’s too dirty. —Sure.

These machines can help recycle the waste which would ______be thrown away

Hearing their grandpa was coming, they began to ________ the work to prepare for a nice dinner.