34 Studying the fruit fly, a household nuisance but a time-honored experimental subject, has enabled the secrets of how embryos develop to begin to be unraveled by scientists.
A) Studying the fruit fly, a household nuisance but a time-honored experimental subject, has enabled the secrets of how embryos develop to begin to be unraveled by scientists.
B) By the study of the fruit fly, a household nuisance and also a time-honored experimental subject, it was possible for the secrets of how embryos develop to begin to be unraveled by scientists.
C) By studying a household nuisance but a time-honored experimental subject, the fruit fly enabled scientist to begin to unravel the secrets of how embryos develop.
D) By studying the fruit fly, a household nuisance and also a time-honored experimental subject, the secrets of how embryos develop are beginning to be unraveled by scientist.
E) The study of the fruit fly, a household nuisance but a time-honored experimental subject, has enabled scientist to begin to unravel the secrets of how embryos develop.
這題b/d的 and also語意需轉折所以錯
a)Studying the fruit fly......has enabled 不通
c)the fruit fly enabled scientist ....不通
我這樣解法對嘛??