Are you happy ________ your English study?—Yes, I think so.[ ]

There are so many flowers on ___________ side of the street．—Yes．I hope that all the flowers belong to _______________．

Rather than _______in the city, the old man would prefer______in the countryside.

Must we send our plan this week?— No, you ______.

Mum, I’m going out with my classmate tonight. —OK. But you’d better _____ back too late.