中国大学MOOC: Drug______ has long been a major problem for the authorities there.
举一反三
- Drug______ has long been a major problem for the authorities there. A: absent B: abnormal C: abuse D: abstract
- The organization has been working with local authorities as well as regional government and officials to ()the problem of climate change.
- 中国大学MOOC:"Now that the problem has been identified, ___________ action can be taken. ";
- What caused such environmental problem? A: The water that used to feed it has been diverted in an ill-irrigation scheme. B: The overfishing problem is too serious there.
- 中国大学MOOC: Smoking has long been ________ lung cancer and even breast cancer.