A simple answer will do. Such as, "scientists haven't figured what The Unknown Common Ancestor is to bonobos, chimpanzees, gorillas and humans." And let me help you out here: you might follow that up with, "But undoubtedly they will, eventually." See? You have faith in the theoretical lines of ascent or descent of those branches by force of nature. Of course, fish still stay fish, bonobos still stay bonobos. It's been nice seeing all the responses, bearing out what some scientists have said about expressing disbelief in my Darwin's theory. Thanks to all those.
Now here is where -- on the excessively UNLIKELY chance that you were ever to actually look at all the evidence presented to you, you would see where you are hopelessly uninformed.
Number 1 -- fossilization is an extremely rare event, but animals dying, and entire species disappearing, is extremely common. Now, if we had the fossilized remains of every animal that ever lived, you could get your wish, but we don't. We don't even have 1 out of a billion fossils of the critters that died on this planet. As someone else pointed out earlier, for any one of us to find our who all 64 of our great-great-great-great-great-great grandfathers were would be utterly amazing, and I don't believe there's anybody alive who could do it. And yet, you do have that many (or possibly fewer if there was any intermarriage in your family).
Number 2 -- if there are bonobos now, then there must have ALWAYS been bonobos, because without evolution there is no way whatever to get them. Yet, the fossil record shows that there were NOT always bonobos, or dogs, or horses, or whale sharks, or chickens, peacocks, amphioxus or anything else. In every case, we can find fossils going back in time for most species -- but only so far and no farther back. Species end and new species start, according to the fossil record.
So, let's just leave you with your Bible, and you can thumb through the pages until you can explain just those two little points. I await your erudition eagerly.