I can’t learn math well. Can you give me some ________

Tony, be quiet, please! Your dad ______ onthe phone.

It was not until 1945, ___ the Second World War came to an end, ____ people began to realize the eventual coming of peace.

More and more students lost interest in his class, which ________ him very much.

__ I admit that all these problems are difficult, I don’t agree that they can’t be solved.