The number 9.11 is a special number, , I think, that will be remembered by the Americans forever.
| A．what | B．it | C．which | D．one |
This is not my story, nor ______ the whole story. My story plays out differently.
| A．is there | B．there is |
| C．is it | D．it is |
Grandpa was shocked by the news. Rarely ______ him so quiet.
| A．do I see | B．had I seen |
| C．I had seen | D．I saw |
It suddenly occurred to him he had left his keys in the office.
| A．whether | B．where | C．which | D．that |
It’s been discovered in the study ______ people are more relieved after forgiving others.
| A．that | B．what | C．which | D．whose |
____ regular exercise is very important, it’s never a good idea to exercise too close to bedtime.
| A．It | B．As | C．Although | D．Unless |