17 . You have to keep dangerous chemicals meeting in the safe place 18. Police had to break the meeting up 19 They may use

1 bình luận về “17 . You have to keep dangerous chemicals meeting in the safe place 18. Police had to break the meeting up 19 They may use”

1. 17. Dangerous chemicals meeting have to be kept in the safe place (by you).

   – keep – kept – kept: giữ

   18. The meeting had to be broken up by police.

   – break – broke – broken

   19. That room may be used for the classroom (by them)

   20. Your hands must be washed (by you).

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   – Bị độngcủa động từ khuyết thiếu:

   $(+)$ S + modal verb + be + V(pp) + (by O)

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