Jack, when shall we go to visit Mr. Smith? – It’s up to him. We’ll go to see him whenever _______.

I always make mistakes in my math exams. What should I do? –I think you should be _________.

Be careful not to ______ your bike with so many heavy bags.

Have you finished your fashion design? – Not yet. I’ll finish it if I _______ ten more minutes.

The shoes were worn out, what’s more, they aren’t worth _____.