Replace the underlined word with a modal auxiliary showing necessity.
David needs to rush to the airport to catch his flight on time.
Would
Might
Shall
Must
David must rush to the airport to catch his flight on time.
Replace the underlined word with a modal auxiliary showing permission. You are allowed to borrow your partner’s stationery.
Fill in the blank with a modal auxiliary indicating necessity.
Rahul _____ submit a letter authorising him to collect Samir’s mark sheet.