_____why he was against cloning human, the scientist explained that it might lead to disaster.
Asked
B. Having asked
C. Being asked
D. To be asked
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Having no one else _____ him with the work, he had to put it off till later.
A. help
B. Helped
C. helping
D. to help
Salt also played an important part _____ population movement and world exploration.
A. at
B. in
C. for
D. by
Los Angeles is really a fascinating city and they have decided to stay for _____three days.
A. the other
B. Other
C. Another
D. others
保险经营者通过人为的事前预防,减少损失的产生,这体现了保险经营机构的()。
A. 分摊经济损失职能
B. 经济补偿职能
C. 投资职能
D. 防灾防损职能