—Hurry up , or you ________ catch the train. 

We ________the difficulty together, but why didn’t you tell me?

It’s nearly eight o’clock. I must hang up and get down to work. My boss________ be here at any moment.

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

According to the factory safety rules, all accidents _____ be reported to the safety officer.