Is the girl in the red skirt your sister?—No. It _______ be her. She has flown to Australia.

Though he got up early, ______ he missed the train.

What is Nancy going to be when she________?__Maybe she is going to be a math teacher.

My friend Tom comes from Canada and _______ is a tall boy with blue eyes.

Did you have breakfast this morning? —No, I got up late and went to school_____ breakfast.[ ]