More and more advanced farm machines ______, the agricultural production increased tremendously.

admin2010-02-22  37

问题 More and more advanced farm machines ______, the agricultural production increased tremendously.

选项 A、using
B、having used
C、having been used
D、to have been used

答案C

解析
转载请注明原文地址:https://kaotiyun.com/show/dm9K777K
0

最新回复(0)