All theWorkers are busy ______ the bridge.A、buildB、buildingC、builtBbe busy do

游客2025-07-10 11

问题 All theWorkers are busy ______ the bridge.

选项 A、build
B、building
C、built

答案 B

解析 be busy doing sth．为固定用法，意为是“忙于做某事”。

转载请注明原文地址:http://tihaiku.com/zcyy/4155945.html

相关试题推荐

随机试题

最新回复(0)