问题
选择题
The workers in the 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
难度适中,考查词组的意思,turn up出现,发生,pick up拾起,收拾mix up混淆,弄混,give up放弃,答案选的应该是B。