[ Tenses ]
What were you doing when the bomb _____?
A. has exploded
B. exploded
C. was exploding

Random Topics:
Simple Past Tense (was/were)Present simple, Present continuous, Singular, PluralGrammar and VocabularyAdjectives and PronounsCountable - UncountableTenses and ArticlesGrammar & VocabularyComparative AdverbModal and Relative PhrasesWill and Will notOther quiz:
Tenses › ViewHe __ (still/work) on his presentation; it’s not finished yet.
A. is still working
B. still works
C. has still worked
D. has still been working
Past Participle › View
Go
A. Going
B. Goes
C. Gone
D. Went
Articles › ViewCan you pass me______salt,please?
A. a
B. an
C. the
Grammar › View
He is reading a book. _______ is very popular.
A. A book
B. The book
C. Book
D. She