---Mary, I heard there was an explosion in Luzhou. Could you tell me how it _______?
---Sorry, I don’t know much about it either.
| A．came on |
| B．came about |
| C．came out |
| D．came over |
Amazing it is, an astronaut’s superior position is filled with potential danger.
| A．when | B．if | C．unless | D．as |
The project to developing the economy and reducing poverty when it is completed.
| A．has contributed | B．had been contributed |
| C．will contribute | D．is contribute |
Overseas Chinese are particularly sought out for positions a high degree or leadership is required.
| A．where | B．which | C．when | D．what |
Thanks to his open-minded parents and schoolmaster, he was lucky enough to grow upthe positive impact of sports.
| A．exposed to | B．to expose to |
| C．being expose to | D．having exposed to |
China issued new plan which calls for immediate action to deal withcountry worsening air pollution.
| A．the ; a | B．a ; the | C．a ; a | D．a ; / |