You’d better go there by train.The train ticket is________the airplane ticket.

—Growing population resulted in growing rubbish.—There is ______that rubbish will become the major threat to human beings in future.

It was ________ the trouble to explain a job fully to new employees.

—How do you like the play?—_______interesting than expected. 

 Living in a highly     society, you definitely have to arm yourself with modern technology and skills.