It’s said that we will take an extra half-day off each week in the near future.— exciting news it is!

The English-Chinese dictionary _____I bought many years ago is still of great value.

依次填入下列各句横线处的成语，最恰当的一组是①这个人_______，见利忘义，前日是朋友，今日就不认你了，大家要当心。②我们做事情要有目标，不要_______，乱定计划，这样往往一事无成。③很多城市对品牌的认识还处于一种初级阶段，在品牌定位上左右摇摆、_______，迷失了方向，错失了机遇。

Do you have anything to say for yourselves?—Yes, there’s one point _______ we must insist on.

My friend just cannot _______ to the different life style here in American.