What a pity! Considering his ability and experience, he ____ have done better.

 ---I saw Mr. Smith at Xianyang Airport this morning.  ---You ____. He’s still on holiday in Hawaii.

I _____thank you too much for all your help to my son while we were away from home.

The dictionary ________ me more than 100 yuan.

--“Where is Tom?”--“He hasn’t come to school today, I think he ______be ill.”