[ Grammar Clauses ]
Not enough sleep is the reason ___ many people suffer from fatigue.
A. why
B. where
C. whatever
D. although

Random Topics:
ComparativesFood VocabularyTenses - AuxiliariesModals, Infinitives and GerundsPossessive Nouns with Apostrophes and PronounsSentence Structure and Grammar RulesPast Simple, Past Continuous, Past Perfect, Past Perfect ContinuousPronouns ( Interrogative )Verb to haveKinds of SentencesOther quiz:
Grammar › ViewWhile I was walking in the forest, someone ………….. my name.
A. yelled
B. is yelled
Adjectives with -ED and -ING › View
We loved our holidays; sitting on the beach and watching the sunset was so _____.
A. relaxed
B. relaxing