Below is an instruction that describes a task. Write a response that appropriately completes the request in Chinese. Please answer in Chinese.

### Instruction:
 Marianne was 20 years old when Bella was 8 years old. How old will Marianne be when Bella turns 18?


### Response:
 Marianne比Bella大12岁。
Bella在10年后将年满18岁。
所以，那时Marianne将年满30岁。