The other day a big, ugly, black bat found its way to my bathroom. I am what is known as “the man of the house”, so it was my _________, in fact my manly duty, to rid the house of the _________ creature.

Being a man does not _________ die fact that I am extremely _________ of bats. All men, I think, sometimes have had that feeling of being _________ in some male role. Sometimes it is something as simple as having to _________ that you know something about car engines when the car won’t start. But sometimes the trap is a(n) _________ one. Many men prefer to be something different from what society _________ men should be. What these men want is the _________ to be what they want to be.

As I came towards the frightening bat, I __________ what would happen if I had simply told my wife that I wouldn’t do it. But I couldn’t do that! I __________ opened the window, carefully lifted a broom and swept the bat out of the __________.

My wife __________ and my son thought I was __________. They rid of the bat, I started to tell them — but then __________. A man doesn’t talk of such things.

The griffon vulture (兀鹫) is an endangered species. _________, conservationists have been training cameras on some of their nests to try to _________ them.

This year they’ve been watching a family _________ on a cliff (悬崖). The pair had single chick. All was going _________ until the mother was killed when she flew into power lines, which are the biggest _________ to the huge birds.

The vultures have to fly far and wide to _________ food, and the experts knew that the father would not be able to provide enough _________ for the chick on his own. The only way to _________ the chick appeared to be to send climbers up to the nest and take it into captivity (圈养). But then someone suggested a different _________ and within a few days of the mother’s death she had a rescuer — Mama Drone (无人机). The drone has been dropping food to the chick every two or three days.

Getting to the cliff isn’t __________. It requires precision flying. They also __________ a drone that would be non-threatening to the chick and other rare __________ in the area.

XTEND is a cutting-edge drone company that __________ in giving operators a pilot’s-eye view. Virtual reality puts the __________ in the drone’s driving seat, as it were. With the company’s __________, the conservationists prepared for the mission by making a __________ of the nest site in their base. Operators __________ practice flights for hours to prepare themselves for the real thing.

And mission Mama Drone has worked out __________. All those involved got the reward they’d __________ earlier this week. The chick __________ for the first time.

When we go out traveling, we need either a map or GPS to point us in the right direction. But bumblebees have______of these things, yet they still know the best route Why is that？

It______that these hardworking little bees try many possible passages before picking out the best one and remembering it the next time they journey out. They learn from “trial and______“, according to a study by scientists from the University of London.

In the study, scientists set up five artificial flowers in a field. Each one of them was______with motion-triggered(运动触发的)cameras and had landing______with drops of sucrose(蔗糖)in the middle to attract the bees.

At first, scientists noticed the bees’ flying routes were long and______. But after they gained enough experience, they______got to their destination quicker. Every-time a bee tried a new route that was shorter than the shortest route it had ever______before, it was likely to use it again.______, the new route would simply be given up and another one was tested.

“The______at which they learn through trial and error is quite extraordinary. for bumblebees, as this complex behavior was thought to be one that only larger-brained animals were______, “ Professor Lars Chittka, leader of the study said.

In fact, the______bumblebees don’t strain(费力)themselves trying every possible route.______, they would only try about 20 out of the 120 possible routes to visit the flowers.

More interestingly, scientists found that if they______a flower, bees would continue looking at that location, even if it has been empty for a long time. “It seems bees don’t easily______a fruitful flower,” Chittka said.