Skill 1-14 __ STRUCTURE on TOEFL

Any possible academic assistance from taking stimulants _______ marginal at best.

• A. it is

• B. there is

• C. is

• D. as

The major cause ______ the pull of the Moon on the Earth.

• A. the ocean tides are

• B. of ocean tides is

• C. of the tides in the ocean

• the oceans' tides

Case studies are the target of much skepticism in the scientific community, ________ used extensively by numerous researchers.

• A. they are

• B. are

• C. yet they

• D. yet they are

Each object ________ Jupiter's magnetic field is deluged with electrical charges.

• A. enters

• B. it enters

• C. entering

• D. enter

_________ creation of such a community was a desirable step, the requisite political upheaval had to be accepted.

• A. Since the

• B. The

• C. Later, the

• D. It was the

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

• A. it is

• B. which is

• C. being

• D. is

Radioactive ________ provides a powerful way to measure geologic time.

• A. it

• B. dates

• C. dating

• D. can

The benefit __________ the study is that it provides necessary information to anyone who needs it.

• A. of

• B. which

• C. that

• D. because

If a food label indicates that a food is mostly carbohydrate, it does not mean _______ is a good food to eat.

• A. and it

• B. and

• C. that it

• D. when

When _______ nests during spring nesting season, Canadian geese are fiercely territorial.

• A. building

• B. are building

• C. built

• D. are built