21.–Excuse me,could you help me to find my son?

21.–Excuse me,could you help me to find my son?
–___________
A.Certainly.
B.Why?
C.No,I can’t.
D.Where is he?
22.–_____
–You too.
E.Merry Christmas!
F.What a beautiful day!
G.Help yourself!
H.It’s very kind of you!
23.–Can I help you with the baggage?
–____________.
A.No,no,I can help it myself.
B.Thank you.
C.Sorry,I can’t.
D..No,I don’t need you.
24.–You haven’tpaid it yet.
–____________.
A.Oh,I’m really very sorry.
B.Thank you.
C.Not at all.
D.Of course,I know.
25.–Your name again,please?_____________.
–It’s Bell Green.
A.Ididn’t quite catch you.
B.Youare Bell Green.
C.Idon’t know you.
D.It’s yourturn.
26.-Could you buy some salt on your way home?
-____________.
A.All right.
B.Is that all?
C.Just a few.
D.Let me see.
27.-I’ve heard that you are going to Thailand.
-Yes,I’ll leave on Sunday.
-That’s great!____________.
-Thank you.
A.Have a nice journey!
B.Watch out!
C.How are you!
D.You are so smart!28.-_____________.
-No,thanks,I’m just looking around.I’ll let you know if I want anything.
A.Could you help me?
B.What will you buy?
C.Can I help you?
D.Do you like to look around?