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

问题补充：

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

A. benefits

B. strengths

C. techniques

D. values

答案：

A. benefits

(答案→)B. strengths

C. techniques

D. values

解析：考查名词辨析。A利益，好处，益处B力气，力量，优点C技能，技巧D价值。句意为了使队员们表现得更好，教练首先得了解他们的优点和缺点。