উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।
ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
He must have neglected his studies
We use must have + past participle when we feel sure about what happened.
Who told the newspapers about the prime minister's plans? It must have been someone close to him.The thief must have had a key. The door was locked and nothing was broken.Oh, good! We've got milk. Mo must have bought some yesterday.