1) The references are extensive but not so extensive that quality students or other readers would be intimidated.
2) PTS has made the assessment that the problems with building permits that exist are not so extensive that they can now form a basis for amending the conditions of the licence.
要不是11题只有A看上去像的,俺才不会选这道呢,not so .. that.. 的作用太不确定了。