由形容词或分词+名词组成的名词惯用语

① The acid test：严峻的考验

The car company praises its latest model. However, the acid test will come when its new cars enter the market.

② An armchair critic/expert：空谈的评论员／专家

Some people like to tell others how to do this and how to do that, but they cant set a good example. Such a person is tantamount to an armchair expert.

③ A back-seat driver：不在其位而爱插手管事的人

No back-seat driver, please,Jim said to Tom.I know how to do my work.

④ Ones besetting sin：容易重犯的'恶习

Harry is quite a likeable person, but his besetting sin is haughtiness.

⑤ A blind alley：死胡同

More and more people think that manual work is a blind alley, as such work will be computerised soon.

⑥ A/ Ones blind spot：盲点

Computers seem to be a blind spot with many old people./ If you cant see a car from your car mirror, that car is in your blind spot.

⑦ A burning question：重要的问题

Of course, we can invite the boss, but the burning question is: will he agree to come?/ Mass unemployment is a burning question of some Asian countries now.