B1
but
Dictionary examples:
He's a math genius, although he can't count his own fingers correctly. (0.0)
I'm trying to save money, although my wallet keeps getting lighter. (0.0)
I love pizza, although my stomach doesn't agree with my heart. (0.0)
He's coming to see us this evening, although I don't know exactly when. (26.2)
He's rather shy, although he's not as bad as he used to be. (30.0)