阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项。

The small town of Rjukan in Norway is situated between several mountainsand does not get direct sunlight from late September to mid-March— 41 six months out of the year.

Of course, we 42 it when the sun is shining," says KarinRo, who works for the town’s tourism office. “We see the sky is 43 ,but down in the valley it’s darker — it’s like on a 44 day.”

But that 45 whena system of high-tech 46 wasintroduced to reflect sunlight from neighboring peaks（山峰）into the valley below. Wednesday, residents（居民）of Rjukan 47 their very first ray of winter sunshine: A rowof reflective boards on a nearby mountainside were put to 48 .The mirrors are controlled by a computer that 49 themto turn along with the sun throughout the 50 and to close during windy weather. They reflecta concentrated beam（束）oflight onto the town’s central 51 ,creating an area of sunlight roughly 600 square meters. When the light 52 ,Rjukan residents gathered together.

“People have been 53 thereand standing there and taking 54 of each other," Ro says. "The townsquare was totally 55 . I think almost all the people in thetown were there. "The 3,500 residents cannot all 56 the sunshine at the same time. 57 ,the new light feels like more than enough for the town’s 58 residents.

"It's not very 59 ,” she says, "but it is enough whenwe are 60 .”