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| A．You should brush your teeth twice a day. | B．Oh, I will go to bed early tonight. |
| C．What else should I do? | D．I have a bad toothache. |
Mr. Lee has a toothache. He is in hospital now.
Dentist: What’s wrong with you, Mr. Lee?
Mr. Lee: Oh, (1) ______
Dentist: Let me have a look. Open your mouth. Oh, you should have some medicine.
Mr. Lee: OK. (2) ______
Dentist: You should keep your teeth clean.
Mr. Lee: What should I do to keep my teeth clean?
Dentist: (3) ______
Mr. Lee: OK. And can I eat sweet food?
Dentist: You can, but you shouldn’t eat too much. (4) ______
Mr. Lee: What should I do this evening?
Dentist: Take the medicine before you go to bed. Take a good rest too!
Mr. Lee: (5) ______
Dentist: That’s right!
Mr. Lee: Thank you.
Dentist: You’re welcome.
同类型试题
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x， x∈R， y∈[–1，1]，周期为2π，函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x， x∈[–1，1]， y∈[–π/2，π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
