老GRE填空题目Section1-5
老GRE填空蕴含着丰富的内容，尽管是旧的题目，但每次做都会有新的收获。留学群GRE频道在此与大家分享老GRE填空题目Section1-5，供大家参考。
Section 1
1. Hydrogen is the _____ element of the universe in that it provides the building blocks from which the other elements are produced.
(A) steadiest
(B) expenda...