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Was daydreaming (correct tense): In this context, the past continuous tense "was daydreaming" is appropriate as it indicates an ongoing action in the past when the teacher called him. Options: (a) Daydreaming: This is the present participle form, and it doesn't convey the correct past tense for the context. (b) Was daydreaming: This is the correct past continuous tense, indicating the ongoing action at the time the teacher called him. (c) Had daydream: This is not the appropriate tense for the context. The past perfect tense is not needed here. (d) Has been daydreaming: This is the present perfect continuous tense, and it is not suitable for indicating an action in the past at a specific moment.
120 × 195 ÷ 13 - ? = 162
33 × 5 - ?% of 250 = 62 - 6
60 % of 250 + √169 * 7 = ?² + 45 % of 160
25% of 400 + 3 × 102 = ?2
? = (22% of 25% of 60% of 3000) + 21
18/2 of 3/9 of 2/6 of 69690= ?
125% of 129 ÷ 43 × 28 ÷ 7 = ? ÷ √16