Solar energy has a lot to offer. To begin with, it is a clean fuel…… 15 , fossil fuels will run out, but solar energy will continue to reach the Earth long after the last coal has been mined and the last oil well has run dry.
答案：(C) What's more
What's more（此外、而且）承接前面「太陽能是乾淨燃料」這個優點，繼續補充第二個優點（不會枯竭），是累加式的列點語氣。Otherwise（否則）、Therefore（因此）、In comparison（相比之下）都不符合這種「還有一點」的累加語意。
四個選項都是轉承語，你知道要看前後關係，但這一段前後好像都在講化石燃料的不好，方向看起來一樣，一時分不出該用哪一個。
答對率剛好五成，鑑別度高達 68，是本批最會分人的一題，分開的是有沒有看出這一段在列清單。這是邏輯勾環，而且線索要往前跨兩句才完整：Solar energy has a lot to offer（太陽能有很多好處）先開了一個清單，To begin with, it is a clean fuel（首先，它是乾淨的燃料）是清單上的第一項。空格這一句講的是第二項——化石燃料會用完，太陽能不會。既然是在同一個清單上再加一項，用的就是累加的轉承語 What's more（此外、而且）。填進去讀成 What's more, fossil fuels will run out, but solar energy will continue to reach the Earth。填不出來的時候，先確認這一段是不是在列清單、空格落在第幾項，往往一步就定案。
Therefore（因此）要求後面是前面造成的結果，但化石燃料會枯竭並不是「排放有害物質」造成的；In comparison（相比之下）與前一句開頭的 In contrast 撞在一起，同一組對比連著用兩次讀不通，而且這一句真正在做的是加一項、不是再比一次；Otherwise（否則）要求前面先有一個條件或指示，這裡沒有。
what's more（此外、而且）、to begin with（首先）、run out（用完、耗盡）、run dry（枯竭、乾涸）、in comparison（相比之下）、have a lot to offer（有很多好處可提供）。
The sun is an extraordinarily powerful source of energy. In fact, the Earth 11 20,000 times more energy from the sun than we currently use. If we used more of this source of heat and light, it 12 all the power needed throughout the world.
We can harness energy from the sun, or solar energy, in many ways. For instance, many satellites in space are equipped with large panels whose solar cells transform sunlight directly 13 electric power. These panels are covered with glass and are painted black inside to absorb as much heat as possible.
Solar energy has a lot to offer. To begin with, it is a clean fuel. In contrast, fossil fuels, such as oil or coal, release 14 substances into the air when they are burned. 15, fossil fuels will run out, but solar energy will continue to reach the Earth long after the last coal has been mined and the last oil well has run dry.