Ithinkhisfailureintheexperimentresulted________hiscarelessness.
from
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Thedelegation________RussiawillvisitLondonthisafternoon.
When ________ to tell the difference between British and American English, the linguist made a long and ________ speech.
WithanappropriaterelativepronounMybrotherspeaksEnglishfluently,________Idon’t.
James has just arrived, but I didn ’ t know he ________ until yesterday.
He ________ violin when I want to sleep.