Bows and arrows have _______ been out of use.
| A．long after | B．long before | C．before long | D．long since |
Many workers were organized to clear away remained of the World Trade Center.
| A．those | B．that | C．what | D．where |
A survey was carried out on the death rate of those who were infected by SARS, ________were surprising.
| A．as results | B．which results |
| C．the results of it | D．the results of which |
In recent years much more emphasis has been put______ developing the students productive skills.
| A．onto | B．in | C．over | D．On |
_____ of water makes Death Valley a desert, but it is by no means devoid.
| A．Lacking | B．Being lack |
| C．Because of lack | D．Lack |
_____ their real economic situations, they got some relief fund from the government.
| A．Considering | B．Considered |
| C．Having been considered | D．Being considered |