61.We decided to advertise our new product (产品) which was made of steel.
62.I’ve never regretted (后悔) the decision to work in the small village.
63.Paul is an excellent student at school.His performance always satisfies (使……满意) us.
64.He was still unsure (不确定的) how to do it though we explained all over again.
65.No one can hold back the wheel (车轮) of history.