水葫芦是一种从国外引进的植物，引入后，很快在部分水域上蔓延，并威胁水中其他生物生存．这说明（　　）

A．生物能适应环境

B．生物既能适应环境，又能对环境产生一定的影响

C．生物能对环境产生一定的影响

D．生物只能适应环境，不能影响环境

根据各个句子的要求变换句型，只要求写出空格部分的内容。

1. She said to me,"Don't write the letter with a pencil." (改为间接引语)

    She told me __________ with a pencil.

2. We should water the young trees every two days. (改为被动语态)

    The young trees ___________ every two days.

3. They haven't decided where to build the new hospital. (改为同一意思的复合句) 

    They haven't decided _________________________ the new hospital.

4. Tom is very pleased with the painting. Kate is very pleased with the painting, too.

    (合并为同一意思的简单句)

    ______Tom _______ Kate are very pleased with the painting.

5. The boy in white is Sue's child. (就划线部分提问)

    ____________________ in white?