Chọn đáp án đúng

Mn giúp với ạ
----- Nội dung dịch tự động từ ảnh -----
Mai: What a pity! I (36)_________ stay at home to look after my younger
sister because my parents aren't at home. What about tomorrow
evening?
Lan: I'm sorry. I (37)___________
go to see my dentist. I have an appointment
with him at 6.30 tomorrow evening..
Mai: (38)______
your teeth?
Lan: Oh, I am having some cavities in my teeth. The doctor say I
fill them in.
(39)
Mai:
I see! I think we (40)________brush our teeth everyday and shouldn't
eat sweet things at night.
You're right! Let's go to the cinema on next Saturday
OK! See you then! Bye, bye!
Lan:
Mai:
Lan: Bye, bye!
36. A. have to
37. A. should
38. A. Why are
C. How are
39. A. ought to
40. A. have to
B. will
B. need
C. should
C. must
B. What's matter to
D. What's matter with
B. have to
B. will
C. can
C. should
D. can
D. will
D. will
D. can