Who do you ____________ is the funniest actor?
A.think B.think over
C.think of D.think about
A
【详解】
句意:你认为谁是最有趣的演员?
根据Who do you _____ is the funniest actor?可知,句意为“你认为谁是最有趣的演员?” think认为,think over思考,think of思考,think about考虑。这里do you think是个插入语,实际上“Who is the funniest actor”用作think的宾语从句。故答案选A。