specialize in (?.)

• be into
• be strong in
• carry on
• conduct
• confine
• do
• employ
• engage in
• exercise
• feature
• follow
• go in for
• limit
• major in
• minor in
• narrow
• practice
• prosecute
• pursue
• read for
• read law
• restrict
• specialize
• study for
• study to be
• tackle
• take on
• take to
• take up
• undertake
• use
• wage
• work at