He could hum songs and difficult______
---There is somebody knocking at the door. Who________ it be?---I’m not sure. It ________ be a postman.
_______ the teachers in the school is one hundred, and _______ of them are women teachers.
---Why did Suzy look so stressed when we saw her?---Because she wondered________.
The second Sunday of May is ________ Mother’s Day. It’s ________ special day for children to show their love for their mothers.
Could you please tell me ____?