中国大学MOOC: Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected from them by _______.
举一反三
- 中国大学MOOC: Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected by _______.
- Today, smallpox, polio, typhoid and measles are no longer common because most people have been protected from them by _______. A: anti-neurohomone drugs B: antiviral drugs C: vaccines D: antibiotics
- ______ has been ended worldwide. A: Polio B: Measles C: Rubella D: Smallpox
- Today, most of people won’t study either Greek or Latin because （） A: they are no longer important B: people do not have enough time C: they are no longer existed D: people can not learn them well
- 中国大学MOOC: You, like most people, probably have been such a situation.