[ Grammar ]
As I walked down the corridor, I heard someone ____ in one of the classrooms.
A. sing
B. sang
C. sings
D. singing

Random Topics:
Gerunds & Infinitives + VocabularyDistinguishing Future TensesProgressive Perfect and Simple Verb TensesThere is or There areGrammar: Have toQuantifiersTenses StructurePresent Continous TenseModal Verbs and ConjuctionsModals and Modal PerfectsOther quiz:
Modal Verbs › ViewI _________ find my own way there. You _________ wait for me.
A. should / can’t
B. have to / must
C. can / needn’t
D. might / mustn’t
Infinitive and Gerunds › View
I don’t mind _________ the washing up.
A. To do
B. Doing
C. Do
Grammar › ViewYou can __________ take the train ________ bus to Kuala Lumpur.
A. so, but
B. either, or
C. neither, nor
D. either, because
Adjective Clause › View
I played there every day with her daughter, ______________ name was Katy.
A. Which
B. Whose
C. That
D. Whom
