．No one knows exactly when our ancestors started talking，but new evidence suggests _______might have happened a long time ago．
| A．which | B．what | C．it | D．they |
The job market is competitive. Therefore, you have to be _________ knowledge and skills in order to employed in the future.
| A．satisfied with | B．cut off |
| C．equipped with | D．focused on |
His first book _________next month is based on a true story.
| A．published | B．to be published |
| C．to publish | D．publishing |
Only when his mother died ________ how much he loved his mother.
| A．he realised | B．did he realise |
| C．he had realised | D．had he realised |
The girl looked at me with a _______expression. Maybe the problem was quite ________.
| A．puzzled; puzzling | B．puzzling; puzzled |
| C．puzzled; puzzled | D．puzzling; puzzling |
Electr
ic trains have now _______ steam trains in England.
| A．taken place | B．taken up |
| C．taken on | D．taken the place of |