根据下列句子及所给汉语提示，写出空缺处各单词的正确形式。（每空只写一词）
1）He has _______ ______ _________ (增加体重) since I last saw him.
2）He left his office job to try to _______ _______ ________ (谋生) on the land.
3）Bryson decided to quit _________ __________ (而不是) accept the new rules.
4）In winter, the town is often _______ _______（切断联系）by snow.