28．— Is Mike going there by bus? — He ought to but he not. He likes riding his bike.A. m

问题补充：

28．— Is Mike going there by bus?

— He ought to, but he not. He likes riding his bike.

A. must

B. may

C. need

D. Can

答案：

A. must

(答案→)B. may

C. need

D. Can

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