The days are gone ________ physical strength was all you needed to make a living.(2011·天津，10)
| A．when | B．that | C．where | D．which |
This is an illness that can result in total blindness ________ left untreated.
| A．after | B．if |
| C．since | D．unless |
Paper produced every year is ________ the world’s production of vehicles.
| A．the three times weight of | B．three times the weight of |
| C．as three times heavy as | D．three times as heavier as |
--You should have thanked her before you left.
---I meant _______. But when I was leaving I couldn’t find her anywhere.
| A．to do | B．to | C．doing | D．doing so |
It is thought that one billion people I the world, _is half the word’s workers, earn their living by farming.
| A．if | B．that | C．which | D．what |
I think whoever makes contributions to the company than the others should get income.
| A．greater; a highest |
| B．more greater; a higher |
| C．greater; the highest |
| D．more greater; the higher |