The policy of the mainland is very clear and straightforward,and the key problem is _____the leaders of Taiwan will accept it．
| A．that | B．how | C．why | D．whether |
I have been living in the United States for 20 years, but seldom ________ so lonely as now.
| A．have I felt | B．I had felt |
| C．I have felt | D．had I felt |
I am certain by no means ________ his word since he has promised an amount of money to the poor.
| A．he will break | B．will he break |
| C．broke | D．did he break |
So quickly ________ is a possibility today may be a reality tomorrow.
| A．are science and technology advancing that |
| B．science and technology advancing are that |
| C．science and technology are advancing what that |
| D．are science and technology advancing that what |
At no time ________ the rules of the game. It was unfair to punish them.
| A．they actually broke |
| B．do they actually break |
| C．did they actually break |
| D．they had actually broken |
Not until he went through real hardship ________ the love we have for our families is important.
| A．had he realized | B．did he realize |
| C．he realized | D．he had realized |