If you feel tired and sick of fat foods, that is ___________ you have to go to the hospital for a medical examination．
| A．why | B．what | C．when | D．whether |
It's the sort of work that _________ a high level of concentration.
| A．calls for | B．makes up |
| C．lies in | D．falls for |
He spoke for quite a long time, but he threw no _________ on themain point.
| A．excuse | B．doubt |
| C．detail | D．light |
I have many friends, some _________ are businessmen.
| A．of them | B．from which |
| C．of who | D．of whom |
_________ its low cost, the appeal of iron as a building material layin its strength, its resistance to fire, and its potential to span vastareas.
| A．Other than | B．Apart from |
| C．Except for | D．Rather than |
Your story has little the facts.
| A．resemblances to | B．resemblances in |
| C．resemblance to | D．resemblance in |