[ Simple Past Tense and Present Continuous Tense ]
Sally: Now, close your eyes and listen carefully. What ………………(I, do)?
Inggrit: You are knocking the door.
A. am I doing
B. are I doing
C. is I doing
D. aren’t I doing

Random Topics:
Past Simple or Past ContinuousPhrase or ClauseComparativeUsed to & would & Past SimplePassive Voice in Past Simple TensePhrasal VerbComparatives, Superlatives, and ModalsV-ing/to-VGrammar: Simple Past and Past ContinuousActive Voice-Present tenseOther quiz:
Grammar › ViewMy friend ______ me a big hug when she ______ me yesterday morning.
A. gave / saw
B. gets / saw
C. gives / sees
D. got / sees
Future Tenses › View
The exhibition _____ on May 5th.
A. finishes
B. is finishing
Articles › ViewI hate ____ violence.
A. a
B. the
C. —
D. an
Correlative Conjunction › View
When I go to the home for the elderly, I ______sing song _____ recite poems for its residents.
A. either….or
B. neither….nor
