1.She asked him to contribute a weekly (每周的) article on European affairs.
2.Thus, last year, Papa insisted (坚决要求) that we learn at least one new thing each day.
3.He made many efforts to enhance (增强) his reputation.
4.The police carried out a thorough (彻底的) investigation.
5.Brave man as he is, he trembles (发抖) at the sight of snakes.