My sister used to make suggestions and tell me, “you ...

★ Modals of Necessity and Suggestion

My sister used to make suggestions and tell me, “you (1) ( ought to / must ) work harder,” but I never listened to her.

A. ought to

B. must

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Then, once you have taken those opportunities, it’s absolutely necessary that you (5) ( have to / had better ) work hard to use them.

A. have to

B. had better