用动词的适当形式填空。

小题1:He would like to be a social worker when he_______ (grow) up.

小题2:The Eiffel Tower is_______ (make) of metal.

小题3:He needs_______ (meet) his close friend.

小题4:They_______ (plan) to go to see the final, but they didn't.

小题5:We are writing to you about_______ (protect) wild animals.

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