To his disappointment, the opinion he had stuck ______ out wrong. [ ]

A. to turn

B. to turning

C. to turned

D. to be turned

领导环境的制约性表现在（）

A.环境要素制约着领导目标选择

B.领导环境影响领导行为方式的运用

C.领导者在领导环境中的作用总是被动的

D.领导者只能在环境中作出有限的选择