[ Tenses and Word Formation ]
The customer ——— complained through a variety of channels before leaving a negative review on the Web site.
A. had
B. did
C. was
D. will

Random Topics:
Relative Clauses and etcObject PronounsWho vs WhomAdjective / Noun + to InfinitiveConditional Sentence Type 0-3Past Progressive TenseIndirect SpeechBare Infinitive and To InfinitivePresent Simple or Present ContinuousCommon Grammar Mistakes and Spelling TipsOther quiz:
WH Questions and Simple Past Tense › ViewWhat does the question word “What” ask about?
A. Persons
B. Things, Events, Concepts, Ideas
C. Place
D. Time
Modal Verbs › View
It expresses an ability to do something. It is a formal way to speak.
A. can
B. able to
C. should
Modals › ViewYou _____ smoke in the office.
A. shouldn’t
B. mustn’t
C. don’t have to
D. should
Verbs of movement › View
But don’t __________ a mirror, or you’ll have bad luck for seven years.
A. scratch
B. break
C. put
D. cross
