Choose the progressive perfect form of the underlined verb ...

[ Grammar ]

    Choose the progressive perfect form of the underlined verb or verb phrase!

    The diplomats worked all night to finish the treaty on time.

A.     had been working

B.     were working

C.     had worked

D.     worked

Select your answer:
A B C D E

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Modals - Reported Speech - Conditionals Subject Verb Agreement; Indefinite Pronouns Offer and Suggestion Second Conditionals Present Continuous for Future Action, Helping & Linking Verbs Gerunds and Tenses Phrases and Tenses Grammar: is/are/was/were Gerund and To Infinitive

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