21

 conversely , arid , height , endorse , fragmentary

 5

 172

 Toefl

 22

 notion , exotic , launch , preclude , infrastructure

 5

 189

 Toefl

 23

 testify , snatch , discard , entail , ancient

 5

 137

 Toefl

 24

 astute , endangered , individual , deem , area

 5

 142

 Toefl

 25

 runoff , gap , accord , professional , exercise

 5

 175

 Toefl

 26

 redundancy , seminal , habitat , incipient , urge

 5

 170

 Toefl

 27

 accustomed , recruiting , sacred , inert , tranquil

 5

 183

 Toefl

 28

 key , perennial , hold , excavate , distribute

 5

 155

 Toefl

 29

 clarify , likewise , fluctuate , readily , allocate

 5

 188

 Toefl

 30

 frivolous , adversary , mean , classify , roster

 5

 179

 Toefl