The boys followed the marks that they ________, until finally they found their way back to the campsite

How long has this bookshop been in business?— _____1982.[ ]

I’m afraid I won’t be able to get to the top of the mountain. It’s hard for me.— Keep on! I’m sure you have a strong _________.

The big box ________ on and I ________ on it.

You promised to _____ the goods to our place immediately, but we haven’t seen any of them yet.[ ]