TOEFL structure 1

The north Pole .... a latitude of 90 degrees north

• it has

• is having

• which is having

• has

The city of Beverly Hills is surrounded on ... the city of Los Angeles

• its sides

• the sides are

• it is the side of

• all side by

Marmots spend their time foraging among meadow plants and flowers or ... on rocky cliffs

• gets sun

• sunning

• the sun

• sunny

The greenhouse effect occurs ... heat radiated from the sun

• when does the Earth's atmosphere trap

• does the Earth's atmosphere trap

• when the Earth's atmosphere traps

• the Earth's atmosphere traps

the Rose Bowl, ... place on New Year's Day, is the oldest postseason collegiate football game in the United States

• takes

• it takes

• which takes

• took

Experiments ... represent a giant step into the medicine of the future

• using gene therapy

• uses gene therapy

• they use

• gene therapy uses

... off the Hawaiian coastline are living, others are read

• While some types of coral reefs

• Some types of coral reefs

• There are many types of coral reefs

• Coral reefs

Nimbostratus clouds are thick, dark gray clouds .... forebode rain

• what

• which

• what they

• which they

Featured at the Henry Ford Museum ... of antique cars dating from 1865

• is an exhibit

• an exhibit

• an exhibit is

• which is an exhibit

Rubber ... from vulcanized silicones with a high molecular weight is difficult to distinguish from natural rubber

• is produced

• producing

• that produces

• produced