He had been working for more than 12 hours. He ...

★ Gerund, Infinitive & Modals

He had been working for more than 12 hours. He ____ tired after such hard work.

A. may be

B. should be

C. can be

D. will be

E. must be

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Roni ____ the ticket yesterday if he had wanted to see the concert.

A. should have bought

B. may have bought

C. could have bought

D. might have bought

E. should reserve