1. What does this sentence, "We mustn't eat sweets to prevent cavities." express? a. Permission b. Obligation c. Prohibition d. No obligation 2. "I can watch tv once I am done washing the dishes." What does the sentence express? a. Permission b. Obligation c. Prohibition d. No obligation 3. "You must turn off your cellphones when you are on an airplane." What does this sentence express? a. Permission b. Obligation c. Prohibition d. No obligation 4. I was using my pencil a minute ago. It ____ be here. What proper modal to use in the sentence? a. Can b. Could c. Would d. Must 5. Which is the correct prohibition statement? a. Cannot leave the house without face mask. b. You mustn't forget your face mask. c. You couldn't forget your face mask d. You will not forget your face mask.
