单项选择题
A.by B.on C.with D.–（不填）
It is（）that he has to ask for help.A.so a big jobB.a so...
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
They are（）students that they all performed well in the ...
单项选择题They are（）students that they all performed well in the nationwide examinations.
A.so diligent B.such diligent C.so much diligent D.such very diligent
Once he starts a job, he won't stop（）it is finished.A.t...
单项选择题Once he starts a job, he won't stop（）it is finished.
A.till B.after C.before D.until
