—What do you think of Tom?
—He has been working very hard. ______ he is an advanced worker.
A.No wonder
B.No doubt
C.No worry
D.No problem
答案:B
考查短语辨析。No wonder 难怪,No doubt 毫无疑问,No worry 不用担心,No problem 没问题,句意:你认为汤姆则呢么样?他一直非常的努力工作,毫无疑问他是一个先进的工作者。所以选B。