用let造句

用let造句：People said we were interfering with nature, and that we should just let the animals die人们说我们是在干涉自然界，还说我们应该任由动物死去；I had to get up at seven o'clock this morning to let them into the building because they had lost their keys今天早上我不得不7点钟就起床开门让他们进楼，因为他们把钥匙弄丢了。