Which sentence correctly uses the past perfect continuous tense?
A. She had been waiting for an hour when he finally arrived.
B. She has been waiting for an hour when he finally arrived.
C. She was waiting for an hour when he finally arrived.
D. She will have been waiting for an hour when he finally arrives.

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Contrast Linking WordsPerfect and Past TensesPhrase and ClauseDirect and Indirect SpeechGrammar - TOEICParticiple Clauses & Cleft SentencesNoun / PronounPast and Past ContinuousPronunciation and VocabularyFormal & Informal WordsOther quiz:
Modal Verb in Passive Voice › ViewNatural resources _________________to protect our planet.
A. must not be conserved
B. must be conserve
C. must not be conserving
D. must be conserved
Present Tenses › View
Identify the present continuous tense in the sentence: ‘She is reading a book.’
A. is reading
B. was reading a book
C. is reading a book
D. reads a book
Grammar › ViewChoose the past participle in the sentence. Ben called a plumber to fix the broken pipe that is dripping in the laundry room.
A. called
B. fix
C. broken
D. dripping
Tenses › View
What does the present perfect tense imply when no specific time is mentioned?
A. An action that happened at an unspecified time in the past
B. An action that will happen in the future
C. A repeated action in the past
D. An action happening right now
