"Genius" is a complicated concept, _ _ many different factors.
| A．involved | B．involving | C．to involve | D．being involved |
As long as we work closely together, we can overcome any difficulty, _________.
| A．however great is it | B．however great it is |
| C．however it is great | D．however it is great |
I don't care how much you earn. _________ is, I think, whether weare happy that really matters.
| A．It | B．Which |
| C．What | D．How |
I was cooking in the kitchen when Dora returned, her face _________with mud and sweat.
| A．covering | B．having covered |
| C．covered | D．to cover |
The factory produced many famous cars, none of _________ shippedto foreign countries.
| A．them | B．which |
| C．it | D．what |
He held out his hand, but the lady refused to take it, which made him feel very _________.
| A．awkward | B．comfortable |
| C．cheerful | D．curious |