– Whose ping pong bat is this? -- I’m not sure. I think it ______be Tom’s.

Mum prepares breakfast for us every morning, so she __________ early.

You ________ stop when the traffic light turns red. 

 --- Do we have to hand in our research reports this afternoon, Professor Smith?--- Yes, you _______ . I will be waiting to check them all the afternoon.

—Must I buy lunch at school?—No, you needn’t. You __________ bring your own lunch if you want to.