After two years’ research, we now have a __________ better understanding of the disease. 

I’m in a hurry. You’d better tell me the truth _______.

One of the greatest benefits of Internet friendships is that they are based on common interests, ________ appearance, age or popularity.

The members of the board are discussing the problem right now; it will _____ have been solved by the end of next week．

I ran across a car crash in Hong Kong, and ________, both sides just politely exchanged the telephone numbers and cards, a surprise to me.