The United States is a country_ (advance) in science and technology
advanced
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Itwillbeinterestingtoseewhat’sgoingtohappenatthenext________(elect).
In August 1977, a satellite to gather data about the 10 million black holes which are thought to be in the Milky Way.
_______(safe)needs to be improved on the railways in that country
We_____knowledge from our families,schools,jobs,and the mass media
This scientist was awarded with several titles for his________(accomplish) in biology
