Choose the best answer to complete each sentence.He learned first aid ________ he wanted to be prepared for emergencies.
A. due to
B. because
C. but
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Choose the best answer to complete each sentence.She hasn't played football ______ she left university.
A. due to
B. since
C. but
Choose the best answer to complete each sentence.I'm happy to help you, ______ I know you'd do the same for me.
A. as
B. however
C. but
马斯洛认为人的需要处于需要最高层次的是。
A. 生理的需要
B. 自我实现的需要
C. 安全的需要
D. 尊重的需要
公平理论是( )提出的
A. 亚当斯
B. 赫兹伯格
C. 梅奥
D. 亚当·斯密