If city noises （ ） from increasing, people （ ） shout to be heard even at the dinner table 20 years from now.
（A）are not kept; will have to
（B）are not kept; have to
（C）do not keep; will have to
（D）do not keep; have to
We would like to go and thank him ourselves, but we （ ） out his address yet.
（A）haven't found
（B）hadn't found
（C）didn't find
（D）don't find
Do I have to take this medicine? It （ ） so terrible.
（A）tastes
（B）is tasting
（C）is tasted
（D）has tasted
