One of our rules is that every student _______ wear school uniform while at school.

You _____ cold if you had put on more clothes the day before yesterday. 

Remember to pack more winter clothes into your suitcase. The winter in Chicago __________ be extremely cold.

----If a new difficulty ______, what would we do ?-----Don’t hesitate to turn to us .

---The research on the new flu virus vaccine is challenging and demanding. Who do you think can do the job?  ---____ my students have a try?