A new material ______ , we have good reason to be optimistic.A、developedB、being

游客2025-05-03 13

问题 A new material ______ , we have good reason to be optimistic.

选项 A、developed
B、being developed
C、was being developed
D、was developed

答案 B

解析本句话考查的是独立主格的用法。

转载请注明原文地址:https://www.tihaiku.com/zcyy/4060201.html

相关试题推荐

随机试题

最新回复(0)

Itseemsareasonableruleofthumbthatanygenuineofferofhelpandsupportf