identify which of the following is an example of a sentence that expresses obligation type of modal
a/ david can speak three languages
b/ i must memorize all of these rules about tenses
c/ you have to take off your shoes before you get into the mosque
d/ you should visit your dentist at least twice a year for better results
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Answer:
b. I must memorize all of these rules about tenses.
"must" is an English word used for obligation.