It is outer space might provide us with new energy sources.
| A．where | B．which | C．what | D．that |
Hollande is a modest and calm person, while Sarkozy, _________，is known to be loud and aggressive(好斗的).
| A．by design | B．by contrast | C．by nature | D．by chance |
Concept cars are a way for designers to________ their ideas on the public with complete freedom.
| A．try on | B．try for | C．try over | D．try out |
Her eyes __________ on her plate and in a short time, she was busy ________.
| A．were fixed, eating | B．fixed, to eat |
| C．were fixed, to eat | D．fixed, eating |
“I think the tie beautiful,” I said, “A man can never have ______ many ties.”
| A．so | B．too | C．enough | D．/ |
— Do you mind if I keep pets in this building? — _______ .
| A．I'd rather you didn't, actually. |
| B．Of course not, it's not allowed here. |
| C．Never mind |
| D．No, you can't. |