All passengers ________ go through safety check before they take a plane.
It makes me very sad whenever I think of my grandma’s______ .
The little girl couldn’t be a student because of her __________.
__________ is really hard _ _ them to climb such a high mountain.
We must _______ to help them out of trouble.
Must I go to a medical school and be a doctor like you ,Dad? No,you _______ .You’re free to make your own decision .