英文についての質問
By the age of 21, Philo Farnsworth had found investors, a few assistants, and a loving wife, Pem, who assisted him in his research. He set up a laboratory in an empty loft. On Sept. 7, 1927, Farnsworth painted a square of glass black and scratched a straight line on the center. He gave the square of glass to Pem's brother, who took it to another room and dropped it between a camera tube and a carbon-arc lamp. Farnsworth watched the receiver. He saw the straight-line image and then, as Pem's brother turned the slide 90 degrees, he saw it move. He had seen the first all-electronic television picture ever transmitted.
この英文の最後の
He had seen the first all-electronic television picture ever transmitted.
について、
過去完了形になっているのは何故ですか？
また、この中のeverの意味はどのように取ればいいのでしょうか？絶えず、始終、ですか？
さらに、
この英文全体に対する問題で、
The word origin of "transmit" is
A. to send.
B. to send across.
C. to broadcast.
D. to move from place to place.
というのがあり、答えはBだったのですが、理由が今ひとつわかりませんでした。
解説を頂けるとありがたいです。
よろしくお願いします。
