He feels that his health ____ owing to ____ a long walk every other day.
| A．is improving; taking | B．has been improved; being taken |
| C．improved; taken | D．is improving; have taken |
So difficult did I find ___ to work out the problem that I decided to ask my partner for help.
| A．myself | B．us | C．it | D．that |
John went to the hospital alone. If he me about it, I would have gone with him.
| A．tells | B．told | C．should tell | D．had told |
____ 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.
| A．A great deal | B．A good many | C．Large numbers | D．Large quantities |
___ we know some basic knowledge concerning AIDS, we can protect ourselves from being infected.
| A．If only | B．Even if | C．So long as | D．Unless |
--- How did you like Nick’s performance last night?
--- To be honest, his singing didn’t ___to me much
| A．accustom | B．appeal | C．occur | D．refer |