问题

English is___ useful language because people in many countries are using it.

A:a
B:an
C:the
D:/;

正确答案是：

同类题型

You look so tired. You______have stayed up late again.

Which of the following sentences is RIGHT

e left the light on.” “Oh, so I have._____ and turn it off.”

You shouldn’t leave the door _____when you go out.

It’s nice ___________ the doctor to devote all thetime he has _______ for the patients.