All of the things there are inexpensive, with prices _________ from about $1 to $10.
| A．changing | B．ranging | C．distinguishing | D．differing |
Although the causes of cancer_____, we do not yet have any practical way to prevent it.
| A．are being uncovered | B．have been uncovering | C．are uncovering | D．have uncovered |
______run fast should take part in the 400-meter race tomorrow.
| A．Anyone who | B．Those who | C．No matter who | D．Whoever |
Was it in the factory_____ you worked five years ago___ you learned the technique?
| A．that; where | B．where; when | C．where; where | D．where; that |
What is most obvious in this book are all those details of daily living which make Mrs. Richard _____ common.
| A．nothing but | B．anything but | C．above all | D．rather than |
The firemen managed to _____ the fire in time.
| A．extinguish | B．prevent | C．suppress | D．ruin |