31. Everyone in the class _________ these exercises. A. have to do B. has to do C. have do D. has do

   Giải thích bước làm:

31. Everyone in the class _________ these exercises.

A. have to do       B. has to do       C. have do       D. has do

→  Everyone: Mọi người số nhiều.

→  A. have to do

→ S + have to + V : Làm việc gì đó ?

HD247

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