[ Noun Clause ]
I am not sure ___
A. who outside is.
B. who is outside?
C. who is outside.

Random Topics:
Relative Pronouns and AdverbsDo / Have / Can - Basic QuestionsMixed ConditionalsSo or SuchBecause / soClause Markers TOEFL GrammarPast Perfect TenseIf ConditionalsSentence Structure and Grammar RulesAdjective / Noun + to InfinitiveOther quiz:
Grammar › View_____ for some challenging, specific rules, most grammar is simply a review and refinement of skills.
A. Accept
B. Except
Adverb › View
I can speak English ________.
A. accurate
B. creative
C. fluently
D. fluent
