He was a knight of King Arthur's Round Table.   It was he that revealed to Arthur Launcelot's illicit love for Guinevere. 

[解說]

1.      “He was a knight of King Arthur's Round Table”：他是個亞瑟王的圓桌武士。

2.      “It was he that revealed to Arthur Launcelot's illicit love for Guinevere”：就是他向亞瑟王透露 Launcelot 對 Guinevere 的不合法愛情。 “reveal”是「洩露」，而 “conceal”則是「隱藏」。 “illicit love”為「不法之愛」， “illicit sale”則為「不法販售」。 

[複習填充]

Agravain was a k      of King Arthur's Round Table.   It was he that r        to Arthur Launcelot's i       love for Guinevere.