._______ a teacher in top universities in China, it is necessary to have at least an overseas doctoral degree.
举一反三
- __________ a teacher in a university, it is necessary to have at least a master’s degree.
- (become)（）a teacher in a university, it is necessary to have at least a master’s degree.
- _____a teacher in a university, it is necessary to have at least a master's degree. A: To become B: Become C: On become D: On becoming
- ________ a teacher in a university , it is necessary to have at least a master's degree. A: To become B: Become C: One becoming D: One becomes
- ______ a teacher in our college, it is necessary to have at least a master’s degree. A: To become B: One becomes C: Becoming of D: Who becomes