You’d better sing. It doesn’t _____ whether you can sing well or not.[ ]

Yesterday evening, I _____ along the street when I suddenly met my maths teacher.

Mum, could you help me cook the dinner? I have no time.— Sorry, I don’t have any time, ________.

Are you in a hurry?—No, I’ve got plenty of time. I _______ wait.

Have you ever been to the Qinghai Lake, Jim?—Yes. That’s the most fantastic place _______ I’ve ever visited.