B1
except if
Dictionary examples:
The book will read itself unless you start reading it now. (0.0)
The pizza will order itself unless you hurry up! (0.0)
The homework will eat your dog unless you finish it tonight. (0.0)
I won't call you unless there are any problems. (16.1)
You can't get a job unless you have experience. (22.5)
Unless you call me to say you're not coming, I'll see you at the theater. (24.1)