Every possible means __________, but none proves successful.
| A．has tried | B．has been tried |
| C．is being tried | D．tried |
The boy really has________good memory.He can write the content of the book from________memory.
| A．a；a | B．a；/ | C．/；a | D．/；/ |
________and short of breath，Andy and Ruby were the first to reach the top of Mount Tai.
| A．To be tired | B．Tired | C．Tiring | D．Being tired |
It is reported that many a new house________at present in the disaster area.
| A．are being built | B．were being built |
| C．was being built | D．is being built |
—I'm not finished with my dinner yet.
—But our friends________for us.
| A．will wait | B．wait | C．have waited | D．are waiting |
I________all the cooking for my family，but recently I've been too busy to do it.
| A．will do | B．do | C．am doing | D．had done |