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1、 We need to draw some useful (conclude) from this experiment.
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2、 I found that this difficult word (spell) wrong on the blackboard just now.
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3、 He waved to me when I walked (pass) his house this morning.
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4、 He gave me a big smile, looking (please) with what I did for him.
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5、 We need to learn some basic (technology) skills for our future study.
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6、 There are many (opportunity) for us to learn new skills at school.
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7、 The (create) of the new app helps people a lot in daily life.
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8、 It is silly of you (ask) such a question. Everyone knows the answer.
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9、 He isn't good at English, so it's (difficulty) for him to answer these English questions.
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10、 It is hard for the old man (run) as fast as the young man.
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11、 It is careless of you (not; bring) your textbook to school.
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12、 The boy was brave enough (walk) through the forest by himself.
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13、 It's selfish Ellen to eat the whole birthday cake alone.
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14、 It is impossible us to go to the Mars in the next ten years.
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15、 It is necessary students to learn English well.
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16、 It is clever Dicks to work out the result of the problem so quickly.
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17、 It's not easy me to buy the flat in Shenzhen. The price of the house is too high.
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18、 It's dangerous children to touch electricity.
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19、 It's stupid them to make such a mistake.
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20、 It's difficult me to work out this problem.