根据句意及汉语提示写出单词,每空只限一词。
David and his______________（妻子）have taught English in this school for many years.
The wind is_______________ (吹) hard outside now. The sound "wuwu" makes us feel afraid.
Wei Hua didn’t go to school because she had a bad _______________ (头痛) yesterday.
It snowed heavily last night. The ground is _______________( 覆盖) with deep snow.
They all think it's_______________（不可能的）to finish the work in such a short time.