完成句子
①He could not ________________ his foolish mistake.
他无法解释自己犯的愚蠢错误。
②________________ should you leave the door unlocked.
决不要不锁门。
③The train was held up for two hours ________________ the snowstorm.
由于暴风雨列车被推迟了两个小时。
④They had to ________________ every possibility ________________ when drawing up the plan.
他们在起草计划时，不得不把各种可能性都考虑在内。