问题
选择题
Jack has been working hard and _____ is no doubt that he will do a good job in the entrance exam.
A．it
B．what
C．there
D．as
答案
答案：C
题目分析：句意：Jack学习很努力，毫无疑问，他会在考试中取得好成绩。there is no doubt that是固定用法，意思是毫无疑问……，选C。