I'll go to the library as soon as I finish what I .
| A．was doing | B．am doing |
| C．have done | D．had been doing |
Some tourists think that the beauty of mountains is greater than ______ of deserts.
| A．one | B．those | C．the one | D．that |
We've got two TV sets, but we still can't watch anything because ______ works properly.
| A．neither | B．either | C．each | D．none |
--- Did you find the pen yesterday?
--- No, I didn’t find ________, but I have bought ________.
| A．it; it | B．one; it | C．it; one | D．one; one |
All of us want very much to see these amusing movies，especially you referred to just now．
| A．any | B．it | C．the one | D．one |
______ has already been pointed out, only by correcting mistakes, can you make progress.
| A．It | B．As | C．That | D．What |