现在完成时的被动语态 — 英语填空题

Complete the sentences with the present perfect passive form of the verbs in bra…

Over the past decade, the ancient shipwreck near the South China Sea ___ by unde…

Since the research submersible returned from the newly mapped ridge, every sampl…

Since the deep-sea survey began, the revised procedures for labeling water sampl…

The condition of the underwater cables on the research vessel ___ (check) twice …

用所给动词的适当形式填空：Since the marine conservation law came in…