Claire had her luggage __________ an hour before her plane left.
| A．check |
| B．checking |
| C．to check |
| D．checked |
His collection of ancient pots, old uniforms of the kings and splendid wedding dresses of royal family __________ a large fortune.
| A．are worth | B．is worthwhile |
| C．is worth | D．are worthwhile |
Nuclear energy __________ be really dangerous at times even though it's a nice energy in general.
| A．shall | B．should |
| C．can | D．must |
_________ is our belief that improvements in health care will lead to a stronger, more prosperous economy.
| A．As | B．That | C．This | D．It |
"Once people think you are a liar, it's hard __________, no matter what you'll say, " father warned his son.
| A．for you to make yourself believe |
| B．for you to make yourself believed |
| C．of you to make yourself believing |
| D．of you to make yourself believe |
Obviously, __________ no one wants to be alone all the time, everyone needs some degree of privacy.
| A．if | B．but |
| C．although | D．because |