TOEFL EXERCISE SKILLS 9-12

Dolphins form extremely complicated allegiances and ... continually change.

• enmities that

• that are enmities

• enmities that are

• that enmities

Scientists are now beginning to conduct experiments on ... trigger different sorts of health risks.

• noise pollution can

• that noise pollution

• how noise pollution

• how noise pollution can

The Apollo 11 astronauts ... of the Earth`s inhabitants witnessed on the famous first moonwalk on July 20, 1969, were Neil Armstrong and Buzz Aldrin.

• whom

• whom millions

• were some

• whom some were

At the end of the nineteenth century, Alfred Binet developed a test for measuring intelligence ... served as the basis of modern IQ tests.

• has

• it has

• and

• which has

... have at least four hours of hazardous material response training is mandated by federal law

• all police officers

• all police officers must

• that all police officers

• for all police officers

A cloud reservoir of negative charge extends upward from the altitude at ... the freezing point.

• temperatures hit

• hit temperatures

• which temperatures hit

• which hit temperatures

In a 1988 advanced officers` training program, Sampson developed a plan to incorporate police in enforcing environmental protection laws whenever ... feasible.

• it is

• is

• has

• it has

... will be carried in the next space shuttle payload has not yet been announced to the public.

• it

• what

• when

• that

During free fall, ... up to a full minute, a skydiver will fall at a constant speed of 120 m.p.h.

• it is

• which is

• being

• is

The fact ... the most important ratings period is about to begin has caused all three networks to shore up their schedules.

• is that

• of

• that

• what