В7Вставьте в предложение подходящий по смыслу модальный глагол: must, mustnt, have

В7
Воткните в предложение подходящий по смыслу модальный глагол: must, mustnt, have to, can, cant, may, should,shouldnt neednt, need и если можете, то растолкуйте почему так, а не по другому.
1. You ___ lie to your parents.
2. These girls look alike. They ___ be sisters.
3. Kate, you ___ go on foot, Ill call a taxi.
4. Students ___ bring books back to the library on time.
5. You ___ stay here for several days, I dont mind.
6. Visitors ___ enter the lab without permission.
7. I ___ see almost anything without my glasses.
8. Cats ___ see in the dark.