Unemployment is a major cause of poverty.
A. 主修的 B. 大量的
C. 主修课程D. 主要的
Tom gave Helen an apple in exchange for a piece of cake.
A. 交换 B. 改变
C. 娱乐D. 教育
He sat down at his desk to figure out the exact figures.
A. 图表 B. 数字
C. 体形，身材D. 人物
He's devoted his whole life to the protection of the rare animals.
A. 保护 B. 过程
C. 污染D. 位置
It struck me that we ought to make a new plan.
A. (钟表)敲，鸣 B. （疾病）侵袭
C. 突然想到 D. 划火柴
The moment I saw him, he began to complain about the bad weather he had while traveling here.
A. 抱怨，埋怨 B. 引起，导致
C. 联系D. 关心，担忧
