David will succeed along the career ladder one day, I firmly believe, _______ he devote more energy to it.
| A．might | B．would | C．could | D．should |
She spent a happy afternoon her coins and stamps she had collected those years.
| A．to look for | B．worked on |
| C．sorting out | D．watch over |
We have reached a point ______ a change is needed.
| A．when | B．with which | C．why | D．where |
Perhaps he is not quite fit for the job, but , please let him have a try.
| A．in fact | B．anyway | C．so | D．otherwise |
water will make the fish in the pond .
| A．Polluting; die away | B．Being polluted; die off |
| C．Polluted; die out | D．Pollution; die down |
I would appreciate it you call back this afternoon for the doctor’s appointment.
| A．until | B．if | C．when | D．that |