【题目】After he consulted with his professor，an idea was beginning to____________ in his mind.
A.pay offB.take shape
C.work outD.make up
在线课程【答案】B
【解析】
考查动词短语。 句意：在咨询教授之后，一个想法在他脑海里成形了。A. pay off还清，取得回报；B. take shape成形；C. work out算出；D. make up组成。根据句意可知，一个想法成形，故选B。