Whenever a natural disaster happens, we should offer ____ help we could to those victims.
| A．however | B．whatever | C．whenever | D．whichever |
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 |
—They are quiet, aren't they?
—Yes. They are accustomed __________ at meals.
| A．talk | B．to not talk |
| C．to talking | D．to not talking |