[ TOEFL Grammar ]
___ caused the fire is still unknown.
A. What
B. That
C. Whether
D. How
Random Topics:
Contrastive ConjunctionsGrammar: SyntaxArgumentative VocabularyIndefinite and Reflexive PronounsLinking Words & PhrasesPast and Present Continuous tenseState Verbs and Action VerbsPast TenseIdentifying Sentence TypesPast Simple vs Past ContinuousOther quiz:
Tenses › ViewGreg said that … a new job.
A. he will need
B. he needed
C. would he need
Conjunction › View
Steven went to the library ________ he needed to borrow a book.
A. because
B. because of
C. due to
D. as a result of
Past Tense › ViewNia and Nadya … Chicken steak last night.
A. ate
B. eat
C. eaten
D. eating
Grammar and Vocabulary › View
By_____1.500.000 tons of insects a year, birds greatly help American farming.
A. ate
B. eating
C. having eaten
D. eat
E. to eat