Rewrite the sentences(根据要求改写句子) 【小题1】There are some pebbles in the bottle.(改成一般疑问句) ____________________________________________ 【小题2】They are old policemen.(改为单数) ____________________________________________ 【小题3】He is happy.(加入sad改为选择疑问句) ____________________________________________ 【小题4】Sally is hungry and tired.(对划线部分提问) ____________________________________________ 【小题5】They are new books. They are Andy’s.(合并为一句) ____________________________________________