下哪项不属于全球社会面临的“灰色地带”的威胁（）。
A.恐怖主义
B.人口增多
C.环境恶化
D.毒品走私
参考答案：B
She must be looking forward as much to his return as he himself is to ______her. [ ]
A. be seeing
B. have seen
C. see
D. seeing
（）是社会主义道德的核心。
A.集体主义
B.五爱
C.奉献精神
D.为人民服务
