Which statement best summarizes the section "A Human Chain"? A. Twenty-two orphaned boys who had never had smallpox became a "human chain" as they crossed the ocean.

B. Many people in Latin America were vaccinated and saved from smallpox due to a "human chain" of boys who were infected with cowpox.

C. A far-reaching vaccination program during the years 1803–1807 helped to prevent many people from getting smallpox.

D. Because of a successful worldwide program to wipe out smallpox forever, there has been no recorded case of it since 1979.

answer: do

the 'italicized phrase' is a noun clause that is used as a direct object.

the best asnwer is b "les encantan los juguetes nuevos" because you are talking about them

a low four-wheeled open carriage of a kind formerly used in russia.

sentences vary by structure as well as by function. there are compound, complex, and compound-complex sentences.

simple sentence

i like to read.

a simple sentence has one independent clause.

compound sentence

i like to read, and i also like to write.

a compound sentence includes more than one independent clause, connected by a coordinating conjunction (and, but, for, nor, or, so, or yet).

complex sentence

i prefer to read books that are bestsellers.

a complex sentence includes one independent clause and one or more dependent clauses. (a dependent clause is one that cannot stand alone.) types of dependent clauses include relative clauses (i kicked the boy who pinched me), adverb clauses (i am going home now because i have a curfew), and noun clauses (i don't know what to do next).

compound-complex sentence

although i prefer to read current bestsellers, i do like to read old agatha christie mysteries, and i also like some 20th-century science fiction.

compound-complex sentences take a bunch of clauses (multiple independent clauses, and one or more dependent clauses) and toss them together like a salad. although these sentences take practice to write in a grammatically correct fashion, they can hold a tremendous amount of meaning, and are common in academic writing.