Beijing, which is the capital of China, has developed into an international city.中国的首都北京已经发展成一个国际化的城市。
Hawaii, which consists of eight principal islands, is a favorite vacation spot.
Rice, which is grown in many countries, is a staple food throughout much of the world.
Goats, which were first tamed more than 9,000 years ago in Asia, have provided people with milk, meat, and wool since prehistoric times.
An elephant, which is the earth’s largest land mammal, has few natural enemies other than human beings.
The blue whale, which can grow to 100 feet and 150 tons, is considered the largest animal that has ever lived.
These trees，which I planted three years ago，were cut by government.
York， which I visited last year， is a nice old city.
His brother has become an engineer ,which he wanted to be.
I have fond memories of my hometown, which is situated in a valley.
She was very patient towards the children，which her husband seldom was.
She is always careless，which we should not be.
He said that he will love her forever，which was not true.
He said that he had never seen her before，which was not true.
He never has problems in his study, which was admired by his teacher.
The owner of the cinema needed to make a lot of improvements and employ more people to keep it running，which meant spending tens of thousands of pounds.
Dorothy was always speaking highly of her role in the play，which， of course， made the others unhappy.
He may have serious stomachache，which makes him keep vomiting .
He set free the birds happily， which was a celebration for his success. 他开心地把鸟放了， 这是对他成功的一种庆祝。（which在从句中充当主语）
The result of the experiment was very good，which we hadn’t expected.
He was educated at a local grammar school，after which he went on to Cambridge.
which 指代前面整个主句，after which在从句中作状语
a. The food which wasn’t in the fridge all went off.
b. The food, which wasn’t in the fridge, all went off.