问题
选择题
. It is the first time that Chinese astronaut Wang Yue________as one of the volunteers for the Mars-500 test project .
A．has been selected
B．had been selected
C．has selected
D．selected
答案
答案：A
考查句型：It is the first time that 后跟从句用现在完成时态，题中主语Chinese astronaut Wang Yue为单数，根据语境是被选为志愿者之一，所以用现在完成时的被动语态。故选A。
。下面有关PHB说法不正确的是 （ ）