For years, many of us relied on ______ (biotic) use to treat various infection.
举一反三
- We all know that department stores and supermarkets use various techniques to persuade us to buy more than we plan to.
- 中国大学MOOC: The waterproof coating will _____________very quickly or after many years depending on use and care.
- 中国大学MOOC: Although the hall was built many years ago, we still use it for ______ purpose.
- It will ______ us several years to learn a foreign language well. A: cost B: take C: spend D: use
- How many types of structure can people use to write problem-solution essays? A: two B: three C: four D: various