[ Grammar ]
What (you, do) ………..when you ………….(hear) that noise?
A. were you doing/ heard
B. you were doing / heard
C. you did/ heard
D. you did / were hearing

Random Topics:
Relative ClauseTenses - AuxiliariesTime ExpressionsFuture PassivePhrases and TensesNouns & PronounsPreference & Future TenseAdjectives Ed and IngAsking & Giving AttentionPresent Perfect vs Past SimpleOther quiz:
Relative Clauses › ViewDo you know the student
A. which won the competition?
B. who won the competition?
C. whose competition won?
D. whom competition won?
Modals › View
Public teachers ____________ attend the mandatory in-service training.
A. can’t
B. must
C. may
D. could
Preposition of Direction › ViewThe cat crawled ________ the sofa.
A. over
B. under
C. on
D. at
Grammar › View
Choose the correct verb from the choices.
The owner of the puppies (seems, seem) interested in finding them good homes.
A. seems
B. seem