[ TOEFL ]
Nimbostratus clouds are thick, dark grey clouds __________ forebode rain.
A. what
B. which
C. what they
D. which they

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Modal Verb Gerund or To InfinitiveGrammar (either..or.. and neither..nor..)Object PronounsDirect and Indirect QuestionConstrative ConjunctionAdjectives & Preposition“Put” Phrasal VerbPreference & Future TenseModals of PredictionNounsOther quiz:
Vocabulary › ViewIt’s usually difficult to learn a ________ language.
A. foreign
B. native
C. abroad
D. mother
Run-on Sentences › View
Elizabeth has success written all over her face. Angeline shows the same type of conviction.
A. Run On
B. Comma Splice
C. Correct Sentence
D. None of the above.
A ___________checks out books
A. vet
B. teacher
C. librarian
D. none
Present Perfect › View
Have you ever ____ off your bike?
A. Fallen
B. Fell
C. Fall
