作业帮Everyone should try to protect the environment.Everyone should ______ ______ _______ protecting the environment.
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Everyone should try to protect the environment.Everyone should ______ ______ _______ protecting the environment.
Everyone should try to protect the environment.
Everyone should ______ ______ _______ protecting the environment.
Everyone should try to protect the environment.Everyone should ______ ______ _______ protecting the environment.
只有三个空,所以只能
Everyone should do best in protecting the environment.
若为4个空,则
Everyone should do all efforts in protecting the environment.
Everyone should do his best in protecting the environment.