Tom has been a vegetarian ____principle for years .
A、inB
【句意】多年来，汤姆一直是一个按原则行事的素食者。
【难点】onprinciple意为“根据行为准则;按照原则”;inprinciple意为“原则上;基本上;大体上”。for和by不与principle搭配。
I am sorry I have no time at present to ____more detail or give you an account of other cities of interest.
The old man should be treated with____.
The present situation forced us to ____ this policy.
Thefanswereveryexcited______DavidBeckhamcametotheshow.
It’s your job________ the pop stars.
