B1
used to show surprise or lack of belief
Dictionary examples:
You can't seriously think that pizza grows on trees, right? (0.0)
Can you believe I found a unicorn in my garden this morning? (0.0)
You can't be serious! Did you really eat 50 hot dogs? (0.0)
Can you believe it? (7.5)
You can't possibly be hungry already! (27.9)