The early pioneers had to many hardships to settle on the new land.
A. go into
B. go along with
C. go back on
D. go through
网友回答
A. go into
B. go along with
C. go back on
(答案→)D. go through
解析：A. go into进入，B. go along with一起去，赞同，附和，C. go back on背弃，D. go through经历，检查，句意：先驱者不得不经历困难才能在这个新的土地上定居下来。所以选D。