Do them one at a time, such as a study, we should pay attention to the book and textbook. While the study was not supposed to talk to friends, other activities like playing telephone, eats sweets.
What do individually, as a student, we should pay attention to the books and textbooks. While students are not supposed to do other activities such as playing with friends on the phone, eat a snack.
Do one thing at a time, such as study, we should pay attention to the book and a textbook. While the study should not be doing other activities, such as talking with friends, play phone to eat sweets.