A friend of mine returned to his house after a holiday, only to find it（）broken into.
A. to be
B. had
C. was
D. had been
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（）is known to the world, Mark Twain is a great American writer.
A. That
B. It
C. which
D. As
适用于二度和三度烧伤的是
A. 磺胺甲恶唑
B. 磺胺多辛
C. 磺胺嘧啶银
D. 磺胺异恶唑
E. 磺胺嘧啶
以快制胜是下述哪种类型领导决策的显著态度（）
A. 自制型
B. 稳健型
C. 果断型
D. 坚持型
对蛲虫感染无效的药物是
A. 甲苯咪唑
B. 哌嗪
C. 恩波维铵
D. 噻嘧啶
E. 吡喹酮
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