[ Vocabulary and Tenses ]
they … for an hour before the doctor came
A. had been waiting
B. waited

Random Topics:
Tenses and ArticleZero Conditional SentencePrefixes SuffixesPast Tense and NeutralGrammar of Future PlansModal Verbs of PermissionUncountable NounsVerb & GrammarTime ClausePassive Voice Present SimpleOther quiz:
Tenses › ViewWhat does tense in a sentence express?
A. The complexity of the verb
B. The form a verb takes to express time
C. The number of subjects in a sentence
D. The length of the sentence
Grammar › View
After the physics lesson, the children know that water ____ at 100 degrees C.
A. will boil
B. is boiling
C. boils
D. boil
Mixed Conditionals › ViewIf I was a good cook,
A. I will invite you to lunch.
B. I would invited you to lunch.
C. I’ll have invited you to lunch.
D. I’d have invited them to lunch.
Grammar › View
My grandfather is very old. So, _____ lives with ______.
A. him …… we
B. he …… us
C. I …… our
D. she …… them
