按要求改写句子。(18分)
(1)My brother is making__a__sandcastle.(就画线部分提问)
________ ________ ________brother ________?
(2)It is warm in summer.(就画线部分提问)
________ the ________ ________ in summer?
(3)It is spring in China.(就画线部分提问)
________ ________is it in China?