Explanation: • Though, although, since, because, if, as যুক্ত Incomplete sentence কে complete করতে হলে এদের সাথে একটি অর্থবহ পূর্ণাঙ্গ sentence যোগ করতে হয়। • তাই complete sentence টি হবে: It is many years since I met you.
Source: Advanced Learner's English Grammar & Composition by Chowdhury & Hossain.
