--Who is the old man talking with your teacher?
---I don’t know. I him before.
| A．was never seeing | B．had never seen | C．never saw | D．wouldn’t see |
----Why did you leave that position?
----I ______ a better position at IBM.
| A．offer | B．offered | C．am offered | D．was offered |
Some experts demanded that children _______ time to sleep and play.
| A．give | B．should | C．would be given | D．be given |
The farmer used wood to build a houseto store grain.
| A．with which | B．in which | C．which | D．where |
According to the periodic table,still some elements undiscovered.
| A．there seem to be | B．it seems to be | C．it seems that | D．here seem |
Calculations, which are astronomically exact, have been madewith the use of computers.
| A．possible | B．it possible | C．possibly | D．to be possible |