The first textbooks _____ for teaching English as a foreign language came out in the 16th century.
.She is a diligent student, and all her spare time she has staying in the library.
I still remember how many years ago I last met her in the countryside.
.His proposal is so idealistic that there are many difficulties in putting it into practice.
As nobody here knows what is wrong with the machine, we send for an engineer to handle the problem.
The Spring Festival, a traditional Chinese festival, is celebrated in Asian countries.