. Which sentence uses the past perfect continuous? a) I had been waiting for an hour. b) I waited for an hour.
A. I will wait for an hour.
B. I was waiting for an hour.
C. I have been waiting for an hour.
D. I had been waiting for an hour.

Random Topics:
Modals VerbPreposition (at,in,on)1st and 2nd ConditionalsSubordinating ConjunctionTenses: Present simple, Past Simple, Future SimpleAdverbs of How Something is DonePhrase or Clauselike/do not likeGerund/ To Verb/ VerbGrammar : Must (Necessity)Other quiz:
Grammar › ViewYour room mate drives quite fast.
The adverb “quite” modifies ………….
A. Verb
B. Adverb
C. Adjective
D. Adverbials
Causative Verb › View
A wise consumer gets his or her phone order_____ in writing before submitting payment.
A. Confirms
B. Confirm
C. Confirmed
D. Confirming
Which word means “to know how something works or what it means”?
A. grow
B. pattern
C. solution
D. understand
Tenses › View
Which one is the correct answer for: Do you think he can do it all alone?
A. He don’t think you can do it all alone.
B. He doesn’t think you can do it all alone.
C. I don’t think he can do it all alone.
D. Don’t you think he can do it all alone.
