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'Therefore' is used to mention that something happens as a result of something else that has been mentioned before. For example - The new boots are lighter and softer, and therefore more comfortable to wear. It can't be used in the beginning. 'Because' and 'so' indicate a cause and effect relationship. They provide a reason for the occurrence of something. But 'so' appears between the 'cause' and the 'effect'. It cannot be used at the beginning. 'Because' can combine the two sentences. D is the answer. "Because he wanted to see the movie before it was over, he came early."
68.98 × 41.03 – (12.33)² + 15.78% of 8398.87 = ? – 40.22
25.22% of (59.9 × 8.01) + 69.97 =?
88% of 900.23 + 74.99 = ?
(5/9 of 2699.81) + (49.88% of 144.18) - (2/7 of 489.77) = ?
(31.9)3 + (34.021)² - (16.11)3 - (42.98)² = ?
1726 1/3 + 40% of 1849.889 + 15.12 × 18.25 = ?
40.02% of 1220.05 = ?2 + 29.09 × 7.99
11.11% of (123.45 + 234.56) + 10.01³ - (5.05 of 7.07) = ? of (88.88 - 33.33)