Tomhasbeenavegetarian____principleforyears.
B
【句意】 多年来，汤姆一直是一个按原则行事的素食者。
【难点】 on principle意为“根据行为准则;按照原则”;in principle 意为“原则上;基本上;大体上”。for和by不与principle搭配。
Tom,withhisparents______toAmerica.They_____backintwoweeks.
Tom, with his parents______ to America. They_____ back in two weeks.
____ before we depart the day after tomorrow, we should have a wonderful dinner party.
We all found_____ to play the game.
Many artists predict that this brilliant young actor __ to be a shinning star.