There ___________ a number of reasons for the fall of the Roman Empire

Read the following passage and mark the letter A, B, C, or D to choose the word or phrase that best fits each of the numbered blanks from 25 to 29  

LET THE CAR DRIVE

     Human beings are notorious for making mistakes. If you look at the police log in any given city on any given day, you will definitely 25) ___________ (that one of the biggest problems all cities face is car accidents. People do all sorts of things that (26) ___________them into trouble on the roadways. Sometimes, they feel sleepy or they talk on cell phones while they are driving. Whatever the case may be, the accidents that are caused are almost always due to human error.  

     The car accident as a human error might be in for a big shake-up that will make the roadways much safer. We may soon be (27) ___________ into an area of self-driving cars that communicate with other cars on the road while (28) ___________the areas around them to avoid obstacles and keep the passengers safe. The technology is already here, and it is proving to be successful.  

     One company that has fully been (29) ___________the idea of driverless car is Google. The company's driverless car program is run by Sebastian Thun, who gained fame in 2005 when his team from Stanford won the Defense Advanced Research Project Agency (DARPA) Grand Challenge.

Ursula and Tess had their little differences at the beginning of their work but now they seem to be ___________ quite nicely.

It seemed as if there was nothing the doctors could do ___________ the patient except hope ___________ a miracle.

There has been little rain in this area for too long, ___________?