The teacher looked at the student with a smile as if him to answer the question.
A. expected
B. to expect
C. expecting
D. expect
网友回答
A. expected
B. to expect
(答案→)C. expecting
D. expect
解析：考查非谓语动词。句意：老师微笑的看着学生们，好像在盼着他们回答这个问题。现在分词作状语表示主语正在进行的伴随性动作，结合语境可知选C。