[ Grammar ]
You have been running in circles ____ 30 minutes!
A. since
B. for

Random Topics:
Verbal TensesComparatives ( adj/ adv)Past Simple, Present Perfect TenseNo Excuse Words / Conjunction SOSimilesQuestion Tags in Verb TensesInfinitives or GerundsPresent Perfect Tense and Simple Past TenseQuantifiers and ArticlesAdverb of MannersOther quiz:
Tenses › ViewThey (not visit) their grandparents last summer.
A. They did not visit their grandparents last summer.
B. They have not visited their grandparents last summer.
Grammar › View
What is the question: You have got two polar bears.
A. You got have to polar bears?
B. Have you two polar bears got?
C. Two polar bears have you got?
D. Have you got two polar bears?
Grammar › ViewI was ________ exhausted by the end of the day.
A. extremely
B. incredibly
C. completely
Grammar › View
Which sentence is in the future perfect tense?
A. The airplane had arrived at the gate already.
B. The airplane has arrived at the gate already.
C. The airplane will have arrived at the gate already.