the weather in the north is very cold in winter but it ____(有时温暖)

the weather in the north is very cold in winter but it ____(有时温暖)
_____(你一旦开始这项任务),you must continue.
you'd better try to ___ (劝她出去) with us tonight.
I would ___ (宁可待在家) rather than go out on such a rainy day.
_____(他坚定的表情) showed that he had made up his mind.
it was my mother ____(买的这本词典) for me last week.