SATgrammarTHanks!Numerousillnessthatwereoncedifficultto-----maynowbediagnosedthrough-----bloodtests.A.detect.perfunctoryB.facilitate...tediousC.administer...pre-emptiveD.treat.gruelingE.observe.inconvenientTheanswerisButwhy?Isn'

Question

SAT grammar THanks!
Numerous illness that were once difficult to ----- may now be diagnosed through -----blood tests.
A.detect.perfunctory
B.facilitate ...tedious
C.administer...pre-emptive
D.treat.grueling
E.observe.inconvenient
The answer is But why?Isn't PERFUNCTORY a negative word?

Answer 1

第一个空我们可以排除掉B、C、D答案,曾经好些疾病难以（诊断、检测）出来,而相近的D答案中的”treat“是”治疗,整个句子没有讲到治疗的内容,还处于检测阶段.
第二个空我们可以通过“may”以及句意来判断,因为句子意思都很简单,没有什么生涩的词语,不一定要用语法知识来做；may也就说目前我们通过血液大概检测出疾病,“perfunctory”可以译为浅层、表面的,不是否定词.
SAT的类型这些模棱两可的句子,我们研究他真正的意思是没有多大必要的,因为就算选出了最佳答案,也不一定能说的过去,它还只是说这五个答案中哪个没那么错误,就选哪个.