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

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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:
Grammar › ViewWhich word is the verb in the sentence?
The tree fell onto the car.
A. car
B. tree
C. fell
D. The
Present Perfect Tense › View
He started to work in the office at 8 o’clock. It’s now 12 o’clock and he just stopped it. It means that he …. for four hours.
A. has worked
B. worked
C. has been working
D. is working
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