Had they known what was coming next, they _____ second thoughts.
| A．may have | B．must have had |
| C．could have | D．might have had |
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 |
—What’s wrong with your coat ?
— Just now when I wanted to get off the bus , the man next to me on it .
| A．sat | B．had sat | C．had been sitting | D．was sitting |
We the manager , but no one the telephone number .
| A．could have called ; knew | B．could have called ; had known |
| C．could call ; had known | D．could call ; knew |
He is running the wind Tom running the right .
| A．down ; and ; on | B．against ; with ; on |
| C．for ; with ; in | D．with ; while ; to |
No progress was made in the trade talk as neither side would accept the condition of .
| A．others | B．the other | C．either | D．another |