按要求改写句子。

1. I like that sweater. (变为复数)

    I like _____________ _____________.

2. I like those books. (改为一般疑问句)

    _____________ you _____________ those books?

3. Red is my favourite colour. (对划线部分提问)

    _____________ your favourite _____________?

4. She doesn't like this shirt. (变为肯定句)

    She _____________ this shirt.

下列离子方程式中，只能表示一个化学反应的是  [ ]

①Ag⁺＋Cl^- =AgCl↓②Ba²⁺＋2OH^－＋2H⁺＋SO₄^2- = BaSO₄↓＋2H₂O

③CO₃^2-＋2H⁺ =CO₂↑＋H₂O   ④Fe＋Cu²⁺ =Fe²⁺＋Cu ⑤Cl₂＋H₂O=H⁺＋Cl^－＋HClO

A．①③

B．②④

C．②⑤

D．只有⑤