. In September 2008 , China’s key milestone in space travel_____when Zhai Zhigang conducted the first space walk.
| A．reached | B．was reached | C．has reached | D．had been reached |
The lucky dog missed _______by his teacher, though he had made a big mistake.
| A．to punish | B．being punished |
| C．punishing | D．to be punished |
—I think your brother is managing your parents’ shop the wrong way.
—I agree. I regret _______it myself!
| A．to run | B．not to run |
| C．not running | D．running |
Upon ______the classroom， I started thinking about my mother.
| A．leave | B．leaving |
| C．left | D．to leave |
Although it had been________ struggle for him to finish______ experiment, he enjoyed the result with________ satisfaction.
| A．the, an, / | B．a, the, / |
| C．a, an, a | D．/, the, a |
The map is one of the best tools a man has ________ he goes to a new place.
| A．whenever | B．whatever |
| C．wherever | D．however |