[ Grammar ]
A:Look! Your cat is dancing! ______ it do that before? B:Yes, it ______ did when(當……時)it was happy.
A. Does; usually
B. Did; seldom
C. Did; danced
D. Did; always

Random Topics:
Tense,noun,preposition,quantityPhrasesTenses and VerbsAdverbs & to beSimiles, Metaphors, Personification and HyperboleUsed toPresent Perfect - Just, Already, YetComparisionsV-ing/to-VModal and Auxiliary VerbsOther quiz:
Simple Past Tense › ViewI’m so tired, I cleaned all my apartment. I ___________ mopped and dusted
A. Sweep
B. Sweeped
C. Swept
D. Swepted
Grammar › View
Hillary and Bill ________ to school yesterday.
A. go
B. goed
C. went
D. going
Is the underline verb a main verb or helping verb?
The puppy has been barking for an hour.
A. main verb
B. helping verb
Simple Present Tense › View
The dog__________ in the house
A. Play
B. Plays
C. Played
D. Playing