Ⅰ. 用括号内所给单词的适当形式填空。
1. No one knows the exact (deep) of that deep lake in our city.
2. It’s (usual) for my little sister to finish homework on time.
3. My (curious) about how plants grow made me plant a sunflower seed.
4. We (success) started a club about environmental protection yesterday.
5. The weather in spring is very (change) in our city, so we need to watch the weather forecast.

1. depth 2. unusual 3. curiosity
4. successfully 5. changeable

Ⅱ. 根据句意及首字母提示填写单词。
1. Susan’s English l is higher than most of her classmates.
2. Some cute frogs like to hide under leaves at the b of the pond.
3. The temperature will stay b zero today, so you’d better put on a thick coat.
4. Beijing is in the n part of China.
5. The Amazon Rainforest shows the power of natural d over time.

1. level 2. bottom 3. below
4. northern
5. development（答案不唯一）

Ⅲ. 选择方框中的短语并用其适当形式填空。
be determined to risk one’s life be important to dive into pour down
1. It talk with our friends when we feel sad, because they can cheer us up.
2. When I told my mum about my worries, tears my face slowly.
3. When summer comes, many kids love to the cool river.
4. My coach train hard every single day.
5. Many firefighters to save people in great danger.

1. is important to 2. poured down
3. dive into 4. is determined to
5. risked their lives

() 1. The Changbai Mountain is one of the greatest of nature. I really hope to visit it one day.

A.chances
B.wonders
C.activities
D.skills

1.B