—Could you please go and see a friend with me this afternoon?—It depends on it is.
So difficult did I find ___ to work out the problem that I decided to ask my partner for help.
John went to the hospital alone. If he me about it, I would have gone with him.
____ of time and energy have been spent in making the earthquake-stricken areas a permanent museum to remind people how disastrous a natural disaster can be.
___ we know some basic knowledge concerning AIDS, we can protect ourselves from being infected.
--- How did you like Nick’s performance last night? --- To be honest, his singing didn’t ___to me much