Just because... 只是因为……
1. We didn't stay just because the weather was bad.
2. I bought the book just because I wanted to learn English.
3. Just because I was a little bit late, I was severely punished.
A: Hey, Mary, nice to see you again. I heard you're going back home to the U.S.
B: Yes. I'm leaving tomorrow. I came here just because I want to say good-bye to you.
A: You're so thoughtful. Wish you a good trip home. And we'll miss you.
B: I'll miss you too, my friends.