Reading & WritingReadingMedium#99Past Perfect Continuous/Progressive Tense
My grandpa __________ (sleep) for three hours when I woke him up.
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3,094 questions
By 10 o'clock she ___________ (watch) TV for 4 hours.
Twelve male students took an online test which measured their reaction time by asking them to click as quickly as possible when a colored rectangle changed its color. The scatterplot above shows...
If the value of tan2 θ + tan4 θ = 1, what will be the value of cos2 θ + cos4 θ?
Linguist Deborah Tannen has cautioned against framing contentious issues in terms of two highly competitive perspectives, such as pro versus con. According to Tannen, this debate-driven approach...