One way to species under' threat of extinction - whatever the cause - is to remove them to zoos and parks and breed them there．
| A．betray | B．resist | C．preserve | D．dispute |
Though we don't know what was discussed, yet wecan feel the topic ________.
| A．had changed |
| B．will change |
| C．was changed |
| D．has been changed |
His sister left home in 1998, and ______ since.
| A．had not been heard of |
| B．has not been heard of |
| C．had not heard of |
| D．has not heard of |
His ten years' hard work paid off and his dream ______ finally.
| A．came true |
| B．realized |
| C．achieved |
| D．was come true |
I'm amazed to hear from my school teacher again.Believe it or not, it's ten years ______ we metlast.
| A．when |
| B．since |
| C．before |
| D．that |
I didn't want ______ stupid but I just stood before my classmates with nothing in my head.
| A．to sound |
| B．to be sounded |
| C．sounding |
| D．being sounded |