根据短句猜英语单词或词组

问题描述:

根据短句猜英语单词或词组
we often ask for it when we have a problem (6 letters)
at some time in the past ( 4,4,1,4 letters)
the word that begins a letter (4 letters )


当我们有问题时找它:
answer (答案)

过去某时
once upon a time(从前有一天)

信件开始时的用词

        dear(亲爱的)(?)