B1
not likely to happen
Dictionary examples:
It's unlikely that my homework will do itself over the weekend. (0.0)
It's unlikely that my bicycle will learn to fly before my next trip. (0.0)
It's unlikely that my pizza will deliver itself to my house. (0.0)
We might see them there, but it's fairly unlikely. (39.6)
He's unlikely to arrive before lunchtime. (40.2)
It's unlikely that we'll see them again. (42.0)