英语 高三 选择题 较难

Unit 2 Grammar: Non-finite Verbs in Context — 英语选择题

冀教版·英语(高中) 英语选择性必修 第二册 AI 三重审校通过

题目
After ___ the final sensor, the engineer saw the machine ___ completely and decided ___ the test until morning. A. installing; shut down; to postpone B. to install; shutting down; postponing C. having installed; to shut down; postpone D. installed; shut down; postponing