有报告指出,在过去50年间,由于过度捕捞,大型食肉型海洋动物(如金枪鱼和鳕鱼)的数量减少了90%。尽管科学家早在10年前就已知道人类的捕捞速度超过了鱼类的自我补充速度,但这一最新的数据无疑是令人震惊的,对人类已构成威胁。这说明了( )
His parents died when he was five, so he was _____ by his uncle.
After going into the concert hall, the mother _____ a friend and went over to greet him.
_____ we gave him something to eat, he would save it up for his little sister.
It is reported that large amounts of money _____ spent on the cross-sea bridge so far.
--- Have you told him we have changed the plan? I _____ have, but I haven’t done it yet.