Which sentence correctly uses the past perfect continuous tense to indicate an action of certain duration with visible results in the past?
A. They had walked in the rain.
B. They were walking in the rain.
C. They had been walking in the rain.
D. They have been walking in the rain.

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Adverb of Frequency and TensesPronoun & Present SimpleWord FormationGrammar Past and Future TenseModals of ProhibitionConjunctions in Complex SentencesPassive and Active SentencesAbilityArticles and PronounsGrammar and Sentence StructureOther quiz:
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B. nose
C. mouth
D. sister
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The conservationists worked tirelessly. They wanted to save the endangered species.
A. The conservationists worked tirelessly like they wanted to save the endangered species.
B. The conservationists worked tirelessly as though they didn’t care about the species.
C. The conservationists worked tirelessly as if they had already saved the species.
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A. her
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Vocabulary & Grammar › View
Before he ________ to Ho Chi Minh city last night, he ________ the contract of the new album.
A. flew / signed
B. had flown / signed
C. had flown / had signed
D. flew / had signed