There is a popular view in cities, strangers are less likely to help an elderly person.
| A．that | B．whether | C．why | D．how |
After ________ seemed a hopeless wait, four coalminers trapped in the mine for 125 hours were finally rescued in Heilongjiang Province.
| A．when | B．that |
| C．it | D．what |
In the office an electrical engineer is looking through the instructions to know ________ the heat system works before the repair work.
| A．whether | B．why |
| C．how | D．that |
Energy, passion and a burning desire are, you see, ________ true learning takes.
| A．that | B．what |
| C．how | D．which |
________ is the most important for him is not his job, but his family.
| A．It | B．As |
| C．What | D．That |
Mary is a humorous and warmhearted woman and that is ________ she is a most popular person in her community.
| A．whether | B．because |
| C．how | D．why |