Fill in the blanks using Must, Mus't, Don't, Have To, Should, Shouldn't, Migth, Can, Can't


You_____be 18 to see the film
Dad_____go and see a doctor. His cough is getting worse all the time
It______be him. I saw a week ago, and he didn't look like that
Children, you______cross the street if the lights are red!
Joyce,______you help with the laundry, please?
It's exactly 10:00 AM. The depaartment store____be open now
The clouds are dark! It ______rain today
You____bu something great for mom's birthday
In times of promblems, we_____ be optimistic​