[ Grammar ]
He … in the pool for half an hour.
A. Swam
B. Has swam
C. Has been swimming
D. Swim

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Indirect SpeechCommunicative GrammarActive and Passive Gerunds and InfinitivesTransportation VocabularyVerb FormIntermediate GrammarTenses - Present and PastComparative AdjectiveQuantifiers / Prepositions of Time and Comparative AdjectivesRelative Clauses and Past PerfectOther quiz:
Question Tags › ViewScientists study climate changes,
A. Aren’t they?
B. Do they?
C. Don’t they?
Homonyms › View
Don’t touch that, you might ___ it.
a. break
b. brake