Darkness before the traveler could find shelter for the night.
| A．set in | B．set down | C．set against | D．set forth |
.Shortly after we .the chairman took his place and declared the meeting open . 
| A．sat ourselves | B．seated down | C．were seated | D．seated |
They believed that production in their factory by bringing in the latest equipment from abroad .
| A．will greatly increase | B．would be greatly increased |
| C．has greatly increased | D．had been greatly increased |
We will have to overcome difficulties we might meet and finish the work ahead of time .
| A．no matter how | B．no matter what | C．however | D．whatever |
Mr .Smith is from Australia , which is to many unique animal species ,like kangaroos and koala bears .
| A．family | B．nation | C．home | D．area |
. It is reported that a bus rolled into a deep valley , 10 deaths and even more injuries . 
| A．to cause | B．having caused | C．caused | D．causing |