单项选择题
It is（）that he has to ask for help.
A.so a big job B.a so big job C.a such big job D.such a big job
单项选择题 They are（）students that they all performed well in the nationwide examinations.
单项选择题 Once he starts a job, he won't stop（）it is finished.
单项选择题 （）you told me, I had heard nothing of what happened.
