2 SCs

12. Traveling the back roads of Hungary, in 1905 Béla Bartók and Zoltán Kodály began their pioneering work in ethnomusicology, and they were armed only with an Edison phonograph and insatiable curiosity.

(A) Traveling the back roads of Hungary, in 1905 Bela Bartok and Zoltan Kodaly began their pioneering work in ethnomusicology, and they were armed only

(B) In 1905, Bela Bartok and Zoltan Kodaly, traveling the back roads of Hungary, began their pioneering work in ethnomusicology, and they were only armed

(C) In 1905 Bela Bartok and Zoltan Kodaly began their pioneering work in ethnomusicology, traveling the back roads of Hungary armed only

(D) Having traveled the back roads of Hungary, in 1905 Bela Bartok and Zoltan Kodaly began their pioneering work in ethnomusicology; they were only armed

(E) Bela Bartok and Zoltan Kodaly, in 1905 began their pioneering work in ethnomusicology, traveling the back roads of Hungary, arming themselves only

why c) is better than b)???

18. School integration plans that involve busing between suburban and central-city areas have contributed, according to a recent study, to significant increases in housing integration, which, in turn, reduces any future need for busing.

(A) significant increases in housing integration, which, in turn, reduces

(B) significant integration increases in housing, which, in turn, reduces

(C) increase housing integration significantly, which, in turn, reduces

(D) increase housing integration significantly, in turn reducing

(E) significantly increase housing integration, which, in turn, reduce

in anwer a), we should put 'reduces' or 'reduce'...   

12、第一：traveling the back roads of Hungary放在主句之前，给人感觉是这俩人先去travel了，然后才开始工作，实际上是为了开展工作两人才去travel的；第二：armed with是伴随began work发生的，把伴随关系改成了并列关系影响句义的表达。这题og有解释，还是去看og的解释最好。