被动语态的基本构成与用法 — 英语填空题
题目
用所给动词的适当形式填空。The Coco de Mer palm (海椰子树) is one of the most amazing plants in the world. Hundreds of years ago, its huge seeds ___ (carry) far across the sea by ocean currents (洋流). Now, this rare plant ___ (protect) strictly in the islands, so people are not allowed to cut it down.