[ Progressive Verb Tenses ]
The door was opening slowly.
A. was opening slowly
B. opening slowly
C. was opening
D. door was

Random Topics:
Present and Past Perfect TensesPrepositions of Location, Movement and TimeSimple Past TensePast ParticiplesVerbs and PrepositionsArticle the or zero article (-)English ArticlePresent SimpleAdverbial ClauseFirst Conditional, Future Time ClausesOther quiz:
Present Perfect Tense › ViewMy father hasn’t slept ________________ twenty-four hours.
A. For
B. Since
Grammar › View
She didn’t come to the party ___ she was feeling unwell.
A. as
B. because
C. since
D. all of the above
Preposition and Conjunction › ViewYellow ______________ red are my favorite colors.
A. so that
B. but
C. or
D. and
English Morphosyntax › View
Kwan likes to read maps, ____________ Angelo doesn’t.
A. either
B. but
