We've got two TV sets, but we still can't watch anything because ______ works properly.
| A．neither | B．either | C．each | D．none |
So difficult____it to work out the problem that I decided to ask Tom for advice.
| A．I did find | B．did I find | C．I have found | D．have I found |
_______homework did we have to do that we had no time to take a rest.
| A．So much | B．Too much | C．Too little | D．So little |
Only then___________ how much damage had been caused.
| A．she realized | B．she had realized |
| C．had she realized | D．did she realize |
In the dark forests ________, some large enough to hold several English towns.
| A．stand many lakes | B．lie many lakes | C．many lakes lie | D．many lakes stand |
Little _____ about his own health though he was very ill.
| A．he cared | B．did he care | C．he cares | D．does he care |