. Four-fifths of the crop ______.
| A．are ruined | B．was ruined | C．were ruined | D．have been ruined |
----I have never heard it _____ before. And you ?
----The same as you.
| A．talking about | B．talked | C．talked of | D．being talked |
In the dark street, there wasn’t a single person _____ she could turn for help.
| A．to whom | B．who | C．from whom | D．that |
She was more headstrong than ______.
| A．the rest of us | B．us the rest |
| C．the other of us | D．us the other |
The car ______ at the present speed until it reaches the foot of the mountain at about ten o’clock tonight.
| A．would go | B．went | C．will be going | D．goes |
Though ______, many laws of nature exist.
| A．not having been discovered | B．having not been discovered |
| C．not having discovered | D．having not discovered |