Дополните эти предложения, используя must ( have ) либо cant (

Дополните эти предложения, используя must ( have ) или cant ( have )
Examples: Is he British? Yes, he must be British.
Did she see you? No, she cant have seen me.
1. Are they married? Yes, they must .
2 .Is he serious? No, he cant ..
3 .Were they in a hurry? Yes, they .
4 .Does Ann know a lot of people? Yes, she
5 .Did Tom know about the plan? Yes, he .
6 .Do they have much money? No, they ..
7 .Was he driving carefully? No, he .
8 .Are they waiting for somebody ? Yes, they .