To make members of a team perform better the trainer first of all has to know their and we

问题补充：

To make members of a team perform better，the trainer first of all has to know their and weaknesses．

A. strengths

B. benefits

C. techniques

D. values

答案：

(答案→)A. strengths

B. benefits

C. techniques

D. values

解析：strengths and weaknesses优点和缺点, benefit n.益处, 好处；technique n.技巧, 手法, 技术；value n.价值, 价格。