The chief reason for building space stations was to ______.
举一反三
- 智慧职教: What ___ used as chief building materials today __ steel and concrete.
- A valid reason for building programs out of functions is______.
- What____used as chief building materials today____steel and concrete. A: have been . . . are B: is . . . are C: are . . . are D: are . . . is
- 1. Money was the chief reason for Steve Jobs to drop out of college. A: 正确 B: 错误
- The main reason for this is that people are living a happier life. A: difficult B: necessary C: simple D: chief