[ Tenses ]
While Ms. Nhung was teaching in Class 4B, she ______ a piercing scream outside.
A. heard
B. has heard
C. was hearing
D. had heard

Random Topics:
Verb PatternsSimple Past/Past ProgressiveDeterminers & QuantifiersPast ContinuousAdjective / Noun + to InfinitiveSimple TensesAdverb of MannerPersuasive TextPresent and Past Simple PassiveWill and Will notOther quiz:
Grammar › ViewI ________________ this movie for three times so far.
A. watch
B. watched
C. am watching
D. have watched
Modal Auxiliary Verb › View
Robbie is a bit upset. Perhaps you …….. speak to him.
A. Must
B. Ought to
No one is here. …… I early or late?
A. What
B. Do
C. Did
D. Am
Tenses › View
Is this the second time you (lose)……………. your job?
A. lose
B. lost
C. has lost
D. have lost
