In today's world，most workers are highly specialized，but this specialization can come at a cost -especially for those on the wrong team.New research by Harvard's Growth Lab uncovers the importance of teams and coworkers when it comes to one's productivity，earning potential，and stays of employment.The research analyzed administrative data on the 9 million inhabitants of Sweden.It found that to earn high wages and returns on education，workers must find coworkers who complement（補足），but not substitute them.
 The research offers a tool to assess the right and wrong coworkers in fields of expertise.The right coworkers are those with skills you lack，yet needed to complete a team.The wrong coworkers are those who have the same skill set as you and eventually lower your value to the employer.For example，those with a degree in architecture are best assisted by workers with engineering，construction，or surveying degrees，and negatively impacted by those with landscape or interior design degrees.
   "We tend to think of skills as something personal that individuals can market to a company， " said Frank Neffke，Growth Lab Research Director， "However，this vision of skills is too simplistic.One person's skills connect to another person's skills，etc.，and the better these connections are，the more productive workers will be，and the more they will earn." Neffke adds that the benefits of working with complementary coworkers are not the same for all workers.Those with higher levels of education seem to benefit much more from working in complementary teams than workers with lower levels.Over the past 20 years，workers with college degrees or higher have been increasingly able to find better matching coworkers.
 Complementary also drives careers.The research shows that people tend to stay longer in organizations with many complementary workers and tend to leave those with many workers who substitute them.These results hold true for up to 20 years of one's career.
 The research also supports several well-known facts，such as cities and large firms pay higher wages.Workers are more likely to find better fitting teams in cities，and large firms often allow workers to specialize.

（1）Which group of workers can make up the best team？

D

D

A．Those who can substitute each other.
B．Those who come from the same place.
C．Those who are expert in the same field.
D．Those who have the complementary skill.
（2）Who may be the best complementary coworker for an architect？

C

C

A．A landscaper.
B．A house agent.
C．A constructor.
D．Another architect.
（3）Employers think more of their staff's

A

A

.
A．dependence relationship
B．struggling spirit
C．physical quality
D．educational level
（4）What can be the best title of the text？

B

B

A．What workers your employer need most
B．How coworkers impact the value of your skills
C．How coworkers get higher wages and a long-term job
D．How complementarity improves your mental potential