Concerns about publichealth led to the construction between 1876 and 1904 of three separate sewersystems to serve metropolitan Boston .
A. Concernsabout public health led to the construction between 1876 and 1904 of threeseparate sewer systems to serve
B. Concernsabout public health have led to the construction of three separate sewersystems between 1876 and 1904 to serve
C. Concernsabout public health have led between 1876 and 1904 to the construction of threeseparate sewer systems for serving
D. Therewere concerns about public health leading to the construction between 1876 and1904 of three separate sewer systems serving
E. Therewere concerns leading between 1876 and 1904 to the construction of threeseparate sewer systems for serving
我选的是B， 现在我知道估计错在HAVE LED时态上
答案是A， 可是CONSTRUCTION OF 3 SYSTEMS 中间用BTW 1876- 1904隔开了，这个用法很少见，是正确的ma ? 哪里还有其他的例子？
The greatest roadsystem built in the Americasprior to the arrival of Christopher Columbus was the Incan highway, which,over 2,500 miles long and extending from northern Ecuador through Peruto Southern Chile.
A. Columbus was the Incanhighway, which, over 2,500 miles long and extending B. Columbus was the Incanhighway, over 2,500 miles in length, and extended C. Columbus, the Incan highway,which was over 2,500 miles in length and extended D. Columbus, the Incan highway,being over 2,500 miles in length, was extended E. Columbus, the Incan highwaywas over 2,500 miles long, extending