Feathers fall to the ground slowly,________ stones fall much faster.

6. _____ I suggest, he always disagrees. 

—Where is that report?—I brought it to you _______ you were in Mr. Black’s office yesterday.      

(2013·江西南昌一模)It hasn't been made clear ________ the new underground line is to be open to traffic.

At the beginning of a speech, it is very important to grab the audience's attention and make them interested in ____ you have to say．