zhouyj1089 Wrote:Since I am not a native English speaker, sometime it is hard for me to find out the right answer
True, although there are many aspects of SC that are less difficult for non-native speakers. Especially pronouns and modifiers, which are used in ways that are almost completely different from spoken language.
Everyone has to learn how those work, but native speakers first have to un-learn what their ears are telling them.
No doubt there are a lot of things that are harder for non-native speakers, but the test writers try pretty hard to even things out.