He had ever climbed this mountain several months before, but _____ he couldn't find the way this time.

[      ]

A. anyhow

B. somehow

C. somewhat

D. sometime

黄土高原千沟万壑的地表形态是由于（）

A、流水侵蚀作用形成的

B、流水搬运作用形成的

C、风力搬运作用形成的

D、风力沉积作用形成的