Modern forms of transportation and munication have done much to the isolation（隔离）of life in Alaska.
A. break down
B. break out
C. break into
D. break through
网友回答
A. break down
B. break out
C. break into
D. break through
解析：考查词组辨析：A. break down崩溃B. break out爆发C. break into闯入D. break through突破，突围，句意：现代形式的通讯和运输大大突破了阿拉斯加的孤立生活状态。选D。