We have an obligation to maintain the environment, as we depend on the resources and services it provides.
举一反三
- When introducing a company’s products, we should provide a top-level description of the products or services it provides.
- The day that we have to ________ on him is gone forever.(depend)
- We have the resources as well as the _____ to finish the project.
- We cannot only depend on the government to solve our environmental problem. We all have to do our bit.
- We have a duty to _____ the law.( ) A: maintain B: uphold C: support D: back