With economy increasing steadily, people ______ enjoy a life of higher quality.
| A．should | B．can | C．may | D．must |
Children should be instructed to put things they belong in their early childhood.
| A．where | B．in which |
| C．to which | D．what |
it is normal for parrots to talk, Einstein, a small bird, is unusual in that whenever she hears a new word or sound, she repeats it over and over until she masters it.
| A．As | B．When | C．While | D．Since |
Jordan kept his illness from his opponents before the final game they might know about it.
| A．now that | B．on condition that |
| C．for fear that | D．in order that |
All the novels in the list, otherwise stated, are all available in this library.
| A．as | B．if | C．although | D．unless |
I have got a car, I don’t get as much exercise as I used to.
| A．So long as | B．Even if |
| C．Now that | D．In case |