—Do you know ____ made him successful in his career?
—Yes. His hard work and determination, of course.
| A．what it was that |
| B．what was it that |
| C．it was what that |
| D．was it what that |
He ____ have finished his work; Otherwise, he would．not be enjoying himself by the seaside．
| A．should | B．must | C．couldn’t | D．can’t |
With more forests being destroyed, huge quantities of good earth_______ each year．
| A．is washing away | B．is being washed away |
| C．are washing away | D．are being washed away |
_______in the forests for nearly a week, the two students were finally saved by the local police．
| A．Having lost | B．Lost | C．Being lost | D．Losing |
The place______ the bridge is supported to be built should be _____ the cross river traffic is the heaviest
| A．which; where | B．at which; which |
| C．at which; where | D．which; in which |
_____ walk is expected to last all day, so bring_____ packed lunch．
| A．A; a | B．The; X | C．The; a | D．A;X |