英语的几道题目,球大神老师回答

英语的几道题目,球大神老师回答
1一A:I'm afraid I'm cathing a cold
---B"you should go home and get---
A good B well C better D best 为什么不能用better?只能用well?
2Tim will be back in half an hour.Do you want to wait for him?
---Oh,no .I can't wait -----long .jUST tell him I'll come tomorrow morning
A him B this C that Dit 为什么用that?不用it?
3-Why is Mrs Green angry?
--we ----late for class
Aare B were C have been D had been 为什么这题不能用完成时呢这也是对现在的影响啊