What’s that ____ the tree —It’s a bird.

Wow, so many books here! How can you find the one I need? —Yhat’s easy．The books are _____ by subject．

Father, you promised!— Well, _____. But it was you who didn’t keep your _____ first.

Years ago we didn’t know this , but recent science______that people who don’t sleep well soon get ill

Waiter, $ 20 for dinner, right–I’m afraid $25, sir, for drinks are________.