—I have signed up for the Oral English Competition.—What a________idea. You even don’t know how to introduce yourself in English.

Sensible people don’t think it is_______ to buy things which are not needed even at a low price.

Sometimes the same word has ________ meaning，which can be ________.

 With April 18’s railway speedup, highway and air transport will have to compete with ______ service for passengers.

—Mary is a(n)        painter .—So she is . She won a national award at the age of fifteen .