উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।
ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
since
We use since to refer back to a previous point in time. We use since as a preposition with a date, a time or a noun phrase:
India has been independent since 1947. (since + date)
I have been happily married for 26 years, since the age of 21. (since + noun phrase)
We also use since as a conjunction to introduce a subordinate clause:
It's been so long since I saw them. (since + clause)