按要求改写句子。
(1)People should save energy.(改为同义句)
People ___________ ____________ energy.
(2)We use wood to make tables and chairs. (对划线部分提问)
_______do we use ________make tables and chairs?
(3)We should walk to the restaurant. ( 改为否定句)
We ______ ______ walk to the restaurant.