The police contended that the difficulties they faced were too severe.
A. argued
B. predicted
C. said
D. suggested
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Many fine cooks insist on ingredients (成分) of the highest quality.
A. demand
B. rely on
C. prepare for
D. create
You have to follow the guide whose sole interest is to cover all spots according to his strict schedule.
A. obvious
B. simple
C. only
D. assumed
Sulfur has occasionally been found in the earth in an almost pure state.
A. regularly
B. accidentally
C. sometimes
D. successfully
下列公式错误的是( )。
A. 总供给=消费十收入
B. 均衡国民收入=消费+储蓄
C. 总供给=消费+储蓄
D. 均衡国民收入=消费十投资