请核对下以下5道选择题回答正确吗?

请核对下以下5道选择题回答正确吗?
21.- Hi,is Thomas there?
- __D_______
A.Who are you?B.Sorry,I'll call him.
C.Hold on.I'll get him.D.Yes,Thomas is me.
22.- Thanks for inviting us to dinner.____D_____
- Thank you!It's so good that you like them.
A.Best wishes to you!B.Enjoy yourself!
C.Congratulations!D.Everything tastes great!
23.- What's the matter,John?
- ______C___
A.I failed my French test.B.It doesn't matter.
C.Nothing's wrong with him.D.I don't think I can.
24.- How are you going on with your English?
- _____C____
A.I am very well.
B.I am going to the library.
C I am going to take College English Test Band Four.
D That's a good question.
25.- What's the problem,Ted?
- ____D_____
A.I don't know.B.Thank you for asking.
C.No problem.D.I can't find my keys.