Question

Choose ALL the sentences in which modal verbs are used correctly.

Accepted Answer

Candidates must remain in the examination hall until all papers have been collected.

Accepted Answer

You needn't print the ticket because a mobile QR code is accepted.

Answer

She can to speak three foreign languages fluently.

Answer

We will must leave early tomorrow morning to catch the first train.

Answer

Students don't ought to submit their research proposals after the deadline.

Answer

They could solved the complicated puzzle without any help.

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