Take all of your litter home with you, it _______ dangerous to animals and spread disease.
A: can be
B: may be
C: must be
A: can be
B: may be
C: must be
举一反三
- _____I take the newspaper away?No, you mustn’t, you _____ read it only here. A: Must, can B: May, can C: Need, can D: Must, need
- ______ a pleasant journey on your way home! A: May you have B: Must you have C: Do you have D: Will you have
- You must ensure the ____________ of all the information you provide, or your application for the visa may be rejected.（真实性）
- All passengers ________ go through safety check before they take a plane. A: can B: may C: must D: could
- May I help you with your luggage? A: Take it easy B: Not at all C: No, thank you. D: See you later.