1．If you witness the accident, please inform (通知) the police.
2．His comprehensive surveys have provided the most explicit (清楚的) statements.
3．He worked all summer to save money for the purchase (购买) of a piano.
4．He was absent (缺席的) from the party yesterday because of his sudden heart disease.
5．Our surroundings (环境) make more difference to our mood than most of us want to admit.
6．After discussing it with my teacher, I made a few adjustments (调整) to my original design.
7．If we hadn't made adequate (充分的) preparations, the conference wouldn't have been so successful.
8．It's amazing how closely Brian and Steve resemble (像) each other.
9．I appreciate your hard work, but I can not give you a guarantee (保证) that you will surely get promoted.
10．An evening party was held to congratulate (祝贺) my classmate on his winning the English contest.
