—Look at the picture on the wall. It ________be David’s.—Yes, his name is on the first page.

I hear you've got some new Australian coins. __________ I have a look?

We ______ the difficulty together, but why didn't you tell me?

It is required that under no circumstances ______ betray ourselves even if there are temptations like money or beauty.

— My dog is really fat.   — You______ have given it so much food.