Who a theory about black holes?A.slow downB.put forwardC.absorb intoD.make room
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Who ________a theory about black holes?
A.slow down
B.put forward
C.absorb into
D.make room for
试题答案
B
解析：考查短语：put forward 提出，想出， 句意：谁想出了关于黑洞的理论？