Not until Betty got to the airport _____ she had lost her tickets.
| A．that she realized | B．did she realize | C．where she realized | D．she realized |
.
Today, when I think of my friend, I remember the way her face _____ when she saw the picture of a dramatic landscape.
| A．cheered up | B．shone up | C．stood up | D．lit up |
.
No．50 High School is as new as No．48 High School．____, it is more beautiful．
| A．If anything | B．If something | C．If necessary | D．If so |
.
We’ve published large quantities of books This year _______we’ve published three
million copies．
| A．only | B．just | C．alone | D．simply |
.
I’ll go to America to strengthen my English _______it isn’t too expensive.
| A．except | B．provided | C．assumed | D．unless |
.
These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on．
| A．would have been unthinkable | B．would not be unthinkable |
| C．would be unthinkable | D．would not have been unthinkable |