| 100% | ERODED | 6 | What the Appalachian Mountains have done since about 480 million years ago |
| 32% | DEEPEN | 6 | What the Army Corps of Engineers got $85 million to do to the Mississippi this year |
| 30% | INCA | 4 | Civilization in the Andes Mountains about 500 to 800 years ago |
| 29% | PAST | 4 | "Do not dwell on the ___..." ("Forget about what has happened...") |
| 28% | WOVE | 4 | What someone must have done to produce the Peruvian Guitarrero Cave's more than 9000 year old textiles |
| 28% | FIREASHINGLESOT | 15 | What the drunk roofer's boss had to do? |
| 27% | COUGHEDUPTHEDOE | 15 | What the mountain lion did with the whitetail stuck in its throat? |
| 27% | REDUCE | 6 | What the enthusiastically environmentally conscious try to do with just about everything |
| 27% | OUST | 4 | What the president did to Mick Mulvaney in March of this year |
| 27% | USCG | 4 | What the Revenue-Marine became about 110 yrs. ago |
| 27% | ASIA | 4 | India joined it about 50 million years ago |
| 27% | BEATING | 7 | What an equivocator is doing about the bush |
| 26% | REUNES | 6 | What the class of '70 does every 10 years, say |
| 26% | STOKE | 5 | What people had to do to keep the "Mauretania" running |
| 26% | SEAN | 4 | Spicer, who three years ago did the job that Kayleigh McEnany does now |
| 25% | BORED | 5 | What they did on the Kola Peninsula for roughly 20 years |
| 25% | LITTHEOLYMPICCAULDRON | 21 | What this puzzle’s featured athletes did in the years indicated |
| 25% | MYREPLYISNO | 11 | ... do you have any idea what you're talking about? |
| 25% | FIRE | 4 | What President Trump did frequently on TV in the years 2004-15 |
| 25% | IDEA | 4 | "You have no ___ what I'm talking about, do you?" |
| 25% | ERODE | 5 | What the Colorado River will continue to do to the canyon for a few more zillion years |
| 25% | LEAKED | 6 | What the CIA's Joshua Adam Schulte did with documents he had access to in March 2016 |
| 25% | ROAST | 5 | Type of presentation that many SNL skits have done to many presidents over the years |
| 24% | CONVERTTOMETRIC | 15 | What you have to do to interpret the answers to 16-, 25- and 40-Across |
| 24% | HURTLED | 7 | What you may have done on the UAE's Formula Rossa |
| 24% | MINDMYPSANDQS | 13 | What I, the constructor, had to do while making this puzzle |
| 24% | USEDFURNITURE | 13 | Some garage sale goods ... or what the answers at 15-, 19-, 33-, 41- and 62-Across have done? |
| 24% | EOCENE | 6 | Epoch 50 million years ago |
| 24% | ENROL | 5 | What you had to do in order to vote in last year's Australian general election |
| 24% | FORKS | 5 | What did Obi-Wan tell Luke when he had trouble eating Chinese food? "Use the ___, Luke" |