—Look！He's running so fast!
—Hard to ________ his legs were once broken.
| A．know | B．imagine |
| C．realize | D．find |
If you make most of every minute in class day after day, there will be switch in grades.
| A．/; / | B．the; a | C．/; a | D．the; / |
----Have you been to the Summer Palace?
----Perhaps not in my memory._______, it might have been during my early childhood
| A．If any | B．If ever | C．If only | D．If not |
_____________ on the portrait, mother was deep in thought.
| A．Fixed her eyes | B．Her eyes are fixed |
| C．Her eyes fixing | D．With her eyes fixed |
An average of 130000 Chinese _________ abroad for studies every year over the past few years, boosting exchanges in the educational fields
| A．was going | B．have been going |
| C．has been going | D．are going |
---- I can’t get through to the general manager’s office anyhow.
---- The line is busy. Someone ___________ the telephone.
| A．can have used | B．can use |
| C．must have used | D．must be using |