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【单选题】
The boy _______ his hands just now.

① was washing
② is washing
③ washes
④ washed
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【判断题】
个体域为整数集, 公式“x$y(x×y = 1)”可翻译成自然语言“对于任意整数 x, 都存在整数 y, 使得 x×y = 1.”

① 正确
② 错误
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【单选题】
The boy and his mother were ____ in the burning house.

① involved
② trapped
③ enclosed
④ surrounded
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【单选题】
The boy lost his ____when he stepped on the icy road.

① way
② weight
③ balance
④ direction
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【判断题】
Every word in the title should be capitalized.

① 正确
② 错误
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【单选题】
The humble bell-boy ______ his tongue reprovingly in front of the princess.

① flipped
② chuckled
③ clucked
④ flickered
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【单选题】
That young boy couldn’t move because he _______ his leg.

① breaks
② broke
③ had broken
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【单选题】
At the end of every term a schoolmaster____ on each of his pupils.

① tells
② reports
③ says
④ discusses
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【单选题】
Every morning Mr. Smith takes a ______to his office.

① 20 minutes walk
② 20 minutes walk
③ 20-minutes walk
④ 20-minute walk
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【单选题】
患者症见渴喜热饮，饮量不多或口渴欲饮，水入即吐，小便不利，多为

① 消渴
② 热盛伤津
③ 热入营血
④ 痰饮内停，水津不能上承
⑤ 瘀血
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