Large quantities of information，as well as some timely help ________since the organization was built.
| A．has offered | B．had been offered |
| C．have been offered | D．is offered |
. By the time she ________ tomorrow, the work ________.
| A．arrives ; will be finished |
| B．arrives ; will have been finished |
| C．will arrive ; will have been finished |
| D．arrives ; will have finished |
Some people waste a lot of food ________ others haven’t enough to eat.
| A．however | B．when | C．as | D．while |
When and where to build the new factory _____ yet.
| A．have not decided | B．are not decided |
| C．has not decided | D．is not decided |
I have many friends, ________ some are businessmen.
| A．of whom | B．from which | C．who of | D．of them |
School children must be taught how to deal with dangerous ________.
| A．states | B．conditions | C．situations | D．positions |