题目

根据语境，从方框中选择恰当的单词填空，有的需要变换形式。 gate, metal, bottle, work, presidentgate, metal, bottle, work, president 【1】Man discovered iron. It is a very useful _________.【2】—What do you think of the writer's _________?—They are beautiful to read, but they are hard to understand.【3】Although her father is the _________ of the company, she is going to get the job on her own.【4】There is a man standing at the _________ of our school. It seems that he is waiting for someone.【5】Mandy was very thirsty, so she took a _________ of water f在地球赤道上空适当的位置利用地球的同步通信卫星转播世界杯足球赛实况，若要使地球上各个地方均能收到卫星传播的信号，所需卫星数量至少为A.1颗B.2颗C.3颗D.4颗