–Whose is this purple scarf?–It _______ be Mary’s. She always wears a purple scarf like this.
The food in the fridge ___________ bad. Throw it away, please.
It is his great pleasure to be ____________ with the highest reward by the president.
Mum, why not ___________ having hamburgers instead of dumplings?
----- Do you play _________ piano in your free time? ----- No, I like sports. I often play ________ soccer with my classmates.
—Let’s go to fly kites in the park. It’s great fun. —_________. I have to do my homework first.