问题
选择题
The workers in HuaShan Mountains have to rubbish to keep the mountains clean.
A．turn up
B．pick up
C．mix up
D．give up
答案
答案：B
题目分析：句意：在华山的工人必须捡拾垃圾来保持山的清洁。A. turn up出现； B. pick up捡起； C. mix up混合； D. give up放弃，根据句意此题选B。