–Great party, Yes? ---Oh, Jimmy. It’s you! ______, we last met more than 30 years ago.
There was a long queue for coffee. Having waited for 10 minutes, we ____ gave up.
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.