Find the mistake.

As a school rule, students don’t have to use their tablets in class.

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According to the school rules, students _______ bring their smartphone to school except for their online classes.

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You should take this Public Speaking course if you want to improve your _______ skills.

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The first-year students can take ______ an online course ______ an in-person course for this semester.

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Marco: Did you know that ______ the universities have sent their students to study abroad?

Zoe: That sounds great! I would like to go to ______ them.

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As the colleges are _______, textbooks and notepads are being replaced.

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Keeping in touch with other people on _______ is popular nowadays.

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To study online, students have to own a tablet or laptop connected to the Internet and make sure that the device is fully _______ before each lesson.