广东省汕头市潮阳第一中学2018届高三5月七校高考冲刺交流英语试题

第一部分 阅读理解（共两节，满分40分） 第一节 (共15小题；每小题2分，满分30分) 阅读下列短文，从短文后每题所给的A、B、C和D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。 A Questioning the existence of aliens is something that scientists have done for decades. In fact, most people do believe that aliens exist in some fashion. The main necessities for life are water and some form of energy source. Not surprisingly, there are some planets, exoplanets and moons that fit the bill. Here are several best chances at finding life in the universe. ◆TRAPPIST-1 TRAPPIST-1 is a planetary system a few dozen light-years away, whose discovery was announced in early 2017. This system consists of seven Earth-like exoplanets orbiting an "ultra-cool" star, and it is one of our shots at finding possible life beyond our own solar system. ◆Titan Titan is the largest moon of Saturn, the sixth planet from our Sun. This moon could potentially harbor life but possibly not in the sense that we think. Titan does not exactly fit the description of being in a typical habitable zone. Ti