问题
选择题
________ of plastics， the machines are light in weight.[ ]
A．To make
B．Having made
C．Being made
D．Made
答案
答案：D
搜题请搜索小程序“爱下问搜题”
________ of plastics， the machines are light in weight.[ ]
A．To make
B．Having made
C．Being made
D．Made
答案：D