. 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 |
An air crash accident happened to the plane, ______.
| A．nobody alive | B．nobody was alive | C．and nobody alive | D．where nobody alive |
I wondered what difficulty he had _____ the plan.
| A．to carry out | B．carrying out | C．carried out | D．with carrying out |
_______ confidence and patience, they failed to settle the difficult problem.
| A．Lack in | B．Lacking of | C．Lacking | D．Having lacked |
______ we do must be in the interests of the people.
| A．Whatever | B．However | C．No matter what | D．No matter how |
He was close to______ in the accident.
| A．be killed | B．being killed | C．killed | D．killing |