Look at that girl. Is it Susan?–No, it _______ be her. She has gone back to her home town .

This morning our head teacher came to school _________ than ________ student in our class.

The summer vacation is coming．Do you have any ideas about the coming vacation?－I volunteering in the old people’s home．What do you think of it?

Peter was so excited _____he received an invitation from his friend to visit Wuxi.

Look ! Mary and her pen pal _there.[ ]