An American_______the bicycle.
A: is invented
B: invented
C: invents
A: is invented
B: invented
C: invents
举一反三
- When was the first bicycle invented The first bicycle was invented .
- It is common knowledge that black tea in China more than 600 years ago. A: is invented B: was invented C: invents D: invented
- It's common knowledge that black tea ______ in China more than 600 years ago. A: is invented B: was invented C: invents D: invented
- 12、It’s common knowledge that black tea _____ in China more than 600 years ago.A、 is invented B、 was invented C、 invents D、 invented A: A B: B C: C D: D
- If computers ______, many problems on space flight could not have been solved. A: had not been invented B: are not invented C: were not invented D: have not invented