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Sentence analysis
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Sentence
Span Details
試験中
under examination; being tested; on trialno-adjective
は
topic markergrammar
問題
question; problem (on a test); problem; issue; matter; doubt; public discussion; controversy; trouble; difficulty; inconveniencenoun
に
direction, time, indirect object, or target markergrammar
注意を集中し
concentrate one's attention; focus; be engrossed in-> 注意を集中するexpression, suru verb
なければならない。
must; have togrammar