根据首字母或中文提示在答题卡上填写完整的单词

1. We were c______ about him when we heard of the accident.

2. They talked about it for hours. F_______, they decided not to go.

3. Here are Daphne and David; the _______ (后者) is my brother.

4. She's gardening _______ (在户外)now.

5. Steve p______ walking to driving,for he thinks it's a better way to exercise.

想一想：把长18厘米、宽9厘米的长方形纸剪成两个最大的正方形，每个正方形的周长是多少？