Question

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

Answer 1

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。