[ Present Perfect ]
Why ______ (Elena, not try) other treatments for her back pain?
A. has Elena not tried
B. did Elena not try
C. is Elena not trying
D. does Elena not try

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Present ProgressiveWestern Europe CountriesPresent Simple with Adverbs of FrequencyPronouns of QuantityAdjective ClauseComparativesParallelism and Subject Verb AgreementSimple Compound and Complex SentencesSimple Past Tense and Past Perfect TenseTAG QuestionsOther quiz:
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A. not join
B. didn’t join
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Many foreign tourists are interested in Vietnamese ___ food.
A. traditional
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B: I………………………..go on holiday.
A. am going to
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Helen always ___ to the radio in the evening.
A. listened
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C. listens
