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

Random Topics:
Conditional Sentence 0, 1Modals for Advice, Obligation/Prohibition, Necessity and Lack of NecessityPronounsAdverb of Frequency and TensesVerb TensesAdverbs of Frequency and Everyday Activitieswas wereAdverbs by TypeConditional SentencesAdjectives & PrepositionOther quiz:
Nouns & Pronouns › ViewNew students at Strafford College of Computer Science are advised to take a free students’ guide booklet and review ……………..thoroughly.
A. themselves
B. them
C. itself
D. it
Adverbs › View
I’m always on time for class. I’m …. late.
A. usually
B. never
C. often
