All normal human beings are ______ at least to a degree -they get a feeling of warmth and kinship from engaging in group activities.

单项选择题The middle-aged woman has been ______ with a serious illness for half a year; she is dying now.

单项选择题He said the（）talks between Britain and America had broken down just before Christmas.

A. bilateral
B. binary
C. biannual
D. bilingual