However much _______, it will be worth it.

Do you know the boy ________ is sitting next to Jim? Yes. He is Jim’s friend. They are celebrating his ________ birthday.

There is no doubt _______ my friend is not satisfied with what they have done.

Mr. Liu is our new head teacher this term and he wants to know _______.

It’s difficult _____ a little girl to answer these questions. It’s really nice ____ you to help her answer them. [ ]