In January, 2004, the United States successfully launched “Spirit”, a Mars Exploration Rover, _____ a new milestone in the history of mankind.
| A．it marked | B．marking | C．marked | D．to mark |
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The computer was used in teaching. As a result, not only , but students became more interested in the lessons.
| A．saved was teachers' energy | B．was teachers' energy saved |
| C．teachers' energy was saved | D．was saved teachers' energy |
As is known to all, Montreal is the second largest French-speaking city in the world, .
| A．Paris is the largest | B．Paris being the largest |
| C．Paris to be the largest | D．Paris be the largest |
---Why does the river smell terrible?
---Because large quantities of water .
| A．have polluted | B．is being polluted | C．has been polluted | D．have been polluted |
I admire my classmate Lisa very much. her prettiness, she was smart and helpful.
| A．Except for | B．But for | C．Apart from | D．Despite |
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