过去完成时的用法 — 英语词汇题

Complete the sentence with the past perfect forms of the verbs in brackets. When…

By the time the climbers finally returned to the base camp at dusk, their guide,…

During the expedition, the team discovered at 4 p.m. that their radio was missin…

An explorer began recording the weather at 6 a.m. The storm started at 5:30 a.m.…

Complete the sentence with the past perfect form of the verb in brackets. When t…

将括号内动词变为过去完成时：At 9 p.m., Mia realised that she _____…