The children ＿＿＿＿＿＿ very quiet； I wonder what they ＿＿＿＿up to.
| A．were； are being | B．are being； are | C．are； do | D．are being； do |
This kind of animal has ______ in the world.
| A．died away | B．died down | C．died off | D．died out |
_____ with the size of the whole earth，the biggest ocean does not seem big at all.
| A．Compare |
| B．Having compared |
| C．Comparing |
| D．Compared |
What do you think of the reasons ______ he explained at the meeting ______ reducing the price?
| A．why；why | B．that；for which | C．that；for | D．which；why |
—I've got some wonderful news.We have been invited to the palace ball.
—Really？______.
| A．I don't believe so | B．I believe not |
| C．I can't believe it | D．I don't believe it |
The people，______ had been damaged by the flood，were given help by the Red Cross.
| A．all whose homes |
| B．all their homes |
| C．all of their homes |
| D．all of whose homes |