[ Grammar ]
You look sad. What___you___about?
A. are___think
B. do___think
C. are___thinking
D. do___thinking

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Present Perfect and Simple Past TenseAdverb of Frequency and TensesAdverb of ConcessionTenses and Time MarkersCompound and Complex SentencesSimple PresentTenses and Word FormationPrepositionsSimple Present ProgressiveIdiom and TensesOther quiz:
Grammar › ViewThere ___ many beautiful mountains and lakes.
A. am
B. is
C. are
D. do
Transitive and Intransitive Verb › View
Freida has lived in three different countries.
A. Transitive
B. Intransitive