The old man should be treated with         .

Mr. Wu is good ____ math. He teaches _____ math well.

 ---____ will he be back? ---In a week.　

－Mona works really hard.－I agree. ___________she is ill, she still goes to school.

 - Have you seen_______ boat in my living-room? - Yes, it's not_______ real one, but it's_______ best model I've ever seen.