[ Tenses ]
They … for an hour before the doctor came.
- had been waiting
- waited

Random Topics:
Grammar, adverbs of frequency placementAdjective SuffixesVerb ConjugationGerund or InfinitiveGrammar MistakesPersonal Pronouns and VerbPresent Continous TenseModals and InversionPassive and Active VoiceGender and GrammarOther quiz:
Determiners › ViewI need ____ favour from you.
A. little
B. a little
C. some
D. a few
Noun Phrases and Adverbials › View
Which of the following is a fronted adverbial?
A. The bird
B. During the night
C. Night
D. The blue bird
Homophones › ViewCan I go with you ______?
A. To
B. Too
C. Two
Grammar › View
There _________ to be a delay .
A. seem
B. seems