Though they are______little children , they have worked out _______many difficult math problems.

Did they have fun _______ the summer Palace ?—Yes. They really enjoyed themselves there.

Why didn’t you leave school? It’s already eight o’clock.— Because I my homework yet.

Why do you ____ very happy this afternoon?—Because we are going to spend the evening at Lily’s house.

We have T-shirts _____ green for only $ 8. [ ]