费德勒认为,影响领导效能的情境变量主要有( )
A. 上下级关系
B. 任务结构
C. 职位权力
D. 领导者特质
I wonder __________ he is crying now.
A. that
B. why
C. how
D. when
Could you tell me how much __________ to fly to Hainan?
A. do it cost
B. does it cost
C. it cost
D. it costs
Could you show me ___________?
A. how can I get to the station
B. where is the station
C. how I could get to the station
D. how I can reach the station