_____ is believed that the betterknown companies spend about 70 per cent of the total cost of the product itself on packaging!
| A．This | B．One | C．That | D．It |
—Tom, you the lazy bone! You left the dishes unwashed again!
—_______? Mom isn’t at home and she can’t hear you.
| A．Why | B．So what | C．For what | D．How come |
The famous writer’s play, ________ in one of my books, was published in 1963.
| A．to mention | B．mentioned | C．to be mentioned | D．mentioning |
_______ at the airport, he telephoned his wife and told her what he would do when he got home.
| A．Once arrived | B．As soon as he reached | C．When he got | D．Upon arriving |
—Have you finished the work?
—Not yet. I _______ to do it just a moment ago.
| A．set off | B．set up | C．set out | D．set down |
______ is known to everybody, the moon travels round the earth every month.
| A．It | B．That | C．As | D．Why |