In August 1977, a satellite to gather data about the 10 million black holes which are thought to be in the Milky Way.
A、launchedB
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Whenapersonimmigratestoanothercountry,heshould_(conscious)adapthimselftothenewenvironment
Thefixedstarwasaplanet.（）
Thepresentcrisisbearssome________(similar)totheoilerisisofthe1970s
Notuntilrecently_____thatThompsonhadbentellingthetruthallalong
Studentsshould（）theirowninterestsaswellasdotheirschoolwork.
