Modal verbs: can, must, should

You _____ ask for permission before using someone else's computer.

• can

• mustn't

• must

• shouldn't

We ______ use a strong password to protect our accounts.

• can

• can't

• should

• shouldn't

They ______ install unauthorized software on company computers.

• mustn't

• can

• shouldn't

• must

You _______ access your work email from anywhere with an internet connection.

• must

• can

• should

• can't

She ______ keep her computer desktop organized to make it easier to find files.

• can

• can't

• mustn't

• should

I ______ post this update. I have a bad Internet connection.

• mustn't

• shouldn't

• can't

• can

You ______ turn off the computer after you finish using it.

• must

• can

• mustn't

• can't

You ______ use my headset. I don't need it now.

• must

• should

• can

• shouldn't

The defect is too serious. We ______ meet the deadline, I'm afraid.

• can't

• can

• mustn't

• shouldn't

You ______ update your software and antivirus programs to protect against security threats.

• must

• mustn't

• can

• can't