Why are credit cards so popular?
举一反三
- Why are so many credit cards accessible to the undergraduates?
- Why do they have to pay in cash?They want to pay by credit cards but the restaurant doesn't take (1)____________, so they have to pay (2) __________.
- Why are internships so popular?
- Why is manufacturing in China so popular?
- Why is AI so popular and powerful these years? （ ）