航空器进近着陆应当经过机场塔台空中交通管制员许可

航空器进近着陆应当经过机场塔台空中交通管制员许可
A、Anaircraftmayapproachtoland，onlyafteranclearancehasbeenobtainfromtheATCcontrollerofthecontroltower
B、Anaircraftmayapproachtoland，onlyafteraclearancehasbeenobtainedfromtheATCcontrollerofthecontroltower
C、Anaircraftmayapproachtolanding，onlyafteranclearancehasbeenobtainedfromtheATCcontrollerofthecontroltower
D、Anaircraftmayapproachtolanding，onlyafteraclearancehasbeenobtainfromtheATCcontrollerofthecontroltower
正确答案：B