If the researchers are successful, they an important step in reproducing the way that humans use cognition（认识力）to interact（交流；互动）in their world．
| A．make | B．would make | C．will make | D．will have made |
The problem was so __________ that such a little boy can't solve it.
| A．funny |
| B．interesting |
| C．complete |
| D．complex |
When such an organised group became too large for its members to travel together comfortably, it would __________.
| A．hurry up |
| B．split up |
| C．make up |
| D．pick up |
My junior middle school teacher had a great influence __________ my career.
| A．on |
| B．with |
| C．to |
| D．over |
I don't mind her criticizing me, but __________ is how she does it that I object to.
| A．it |
| B．that |
| C．this |
| D．which |
That was really a splendid evening. It's years __________ I enjoyed myself so much.
| A．when |
| B．that |
| C．before |
| D．since |