. While Mrs Tan ___________ the floor, the pizza deliveryman rang the doorbell.
A. mop
B. will mop
C. has mopped
D. was mopping

Random Topics:
Articles with SubstancesPast and Present TensesSpeech TensesGrammar-Present Continuous-Sentence MakingConnectives (because, due to, owing to, because of)Adjective and AdverbGrammar: AgreementWh-QuestionModal Verbs for SpeculationGrammar MistakesOther quiz:
Preposition and Adjective › ViewPut the words in order to make sentences. “are / better / than / fresh ones / frozen / vegetables / I / think”
A. I are better think frozen vegetables than ones fresh.
B. I think are vegetables frozen better ones fresh.
C. I vegetables think are frozen ones fresh better.
D. I think fresh vegetables are better than frozen ones.
E. Ones frozen better think than fresh vegetables.
Superlative Adjectives › View
Summer is the ….. Season
A. Hottest
B. Hotest
C. Hot
Grammar (either..or.. and neither..nor..) › ViewI will wear ………. the red sweater ………. the black shirt to the concert.
A. either…or
B. neither…nor
Pronoun Antecedent Agreement › View
Dad spoke to James and me about the mess. He told ______ to clean it up.
A. him
B. we
C. us
D. them