No matter how hard I tried, I couldn’t open the door.
A. Although I tried very hard, I couldn’t open the door.
B. Although I tried very hard, I could open the door.
C. In spite of I tried very hard, I couldn’t open the door.
D. I couldn’t open the door,even though trying very hard.

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Present and Past TensesSo....that... Such.......thatWish clauseTemporal Conjunctions and ConnectivesIdiomsPassive Voice in Past Simple TensePresent Simple: affirmative, negative, interrogativeComparatives - SuperlativeConditional Sentences Type 1Adverbs of TimeOther quiz:
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