[ Mixed Tenses ]
The burglar ______ quietly around the living room when he accidentally knocked over a vase.
A. is creeping
B. are creeping
C. was creeping
D. had crept

Random Topics:
Subjective and Objective PronounPast Simple Negative & QuestionsPassive Voice Present SimpleAdverb of Frequency and TensesGrammar ModalsSimple TensesTenses of VerbsAdverbial PhrasesParts of Speech and GrammarTenses PracticeOther quiz:
Adjective vs Adverb › ViewThis is a _____ problem in our society.
A. current
B. currently
Simple and Compound Sentences › View
Margaret and Maizon have been friends for a very long time.
A. Simple Sentence
B. Compound Sentence
Grammar › ViewYou are my friend, ……?
A. Aren’t you?
B. Aren’t I?
C. Do you?
Gerund or to Infinitive › View
I’m trying really hard ______ this text.
A. to understand
B. understand
C. understanding
D. understood