Question

do now: agreement quiz
directions: for each question, choose the answer that completes the text with the most logical or precise word or phrase. shade the bubble for the letter corresponding to the answer you think is best.
1 for centuries, the primary red on an artists palette came from the compounds of lead and mercury. the pigment, known as
ed lead,\ __________ in ancient china, egypt, greece, and rome.
(a) have been used
(b) was used
(c) were used
(d) used
2 jane and maria porter, who wove fascinating tales out of accounts drawn from history books, are often credited with the invention of the first historical novel. __________ certainly the first to achieve critical acclaim with novels whose protagonists included a mix of real - figures and invented characters.
(a) she was
(b) some were
(c) they were
(d) this was
3 despite some similarities, the four largest planets are quite distinct from one another. jupiter and saturn are much larger than uranus and neptune, and each pair of planets __________ a different composition.
(a) has
(b) have
(c) having
(d) would have
4 over the last several decades, the internet has fundamentally changed how we live, work, and play. from virtual classrooms to electronic banking to online gaming, many of our daily actions and interactions are now governed by the web. while __________ has numerous benefits, it has some drawbacks as well.
(a) that
(b) these
(c) this
(d) this technology
5 exercise can help people lose weight and avoid gaining it. however, identifying the cellular mechanisms that underlie this process __________ difficult because so many cells and tissues are involved.
(a) are proving
(b) has proven
(c) have proven
(d) is proven

Explanation:

1. The subject "pigment" is singular and the action happened in the past, so "was used" is correct.
2. "Jane and Maria Porter" are plural, so "They were" is appropriate to refer to them.
3. Each pair of planets is considered as a single - unit subject here, so the singular verb "has" is correct.
4. "The Internet" is a singular subject, and "this technology" can be used to refer to it.
5. The subject "identifying the cellular mechanisms" is a gerund - phrase acting as a singular subject, so "has proven" is correct.

Answer:

1. B. was used
2. C. They were
3. A. has
4. D. this technology
5. B. has proven