Ответ:

1. as black as coal

2. as cold as ice

3. as blind as a bat

4. as white as snow

5. as light as a feather

6. as free as a bird

7. as slow as a snail

8. as changeable as weather

9. as smooth as silk

Ответ:

1. The night was [as black as coal]

2. Her hateful eyes were [as cold as ice]

3. Without my glasses, I am [as blind as a bat]

4. Her face has become [as white as snow]

5. The bicycle looks heavy, but it feels [as light as a feather]

6. On the first day of his vacation, the boy felt [as free as a bird]

7. My computer is very fast at times, and at other times [as slow as a snail]

8. When I was a child, a man of seventy seemed to me to be [//]

9. After using our body lotion, your skin is guaranteed to feel [as smooth as silk]

Объяснение:

В 8 нет подходящего варианта, можно, конечно, использовать конструкцию "as  changeable as weather" (переменчивый, как погода), которая не была использована, ведь каждый сравнивает так, как ему хочется, но, по моему мнению, звучит это нелепо: Когда я был ребенком, люди 70-ти лет казались мне переменчивыми, как погода. Звучит не логично, поэтому такое сравнение использовать я бы не стала.