Topics: TOEFL
Nimbostratus clouds are thick, dark grey clouds __________ forebode rain.
A. what
B. which
C. what they
D. which they
Select your answer:

Random Topics:
Tenses & PrepositionGrammar - ConnectorsSubject Verb Agreement; Indefinite PronounsModals and Past ModalsComparative AdverbIndirect SpeechGrammar - some / anyPast Simple vs Past ContinuousConditionals (0 - 1 - 2)Demonstrative PronounOther quiz:
Tenses › ViewKen Zern ___________ go to the movies this weekend.
A. did
B. does
C. do
D. will
Prepositions › View
She has been working ________ early morning.
A. In
B. Since
C. At
D. During
