peter这里应该填什么a letter from his cousin yesterday morning

peter这里应该填什么a letter from his cousin yesterday morning
peter这里应该填什么a letter from his cousin yesterday morning

peter这里应该填什么a letter from his cousin yesterday morning
received

received啊，其实这是一般过去时，所以要加d，yesterday morning限制了要填这个。如果填完成时也可，两个词 had received 。尽力帮你了，加油！我在搞任务，采纳我好吗。

直接填“got”就得了。弄那么复杂干嘛。当然received也是正确的。
不能使用完成时，因为有表示过去的“yesterday”。