Chọn câu đúng : 1.My daughter studied very hard, so she could get good grades for the tests. * a.My daughter studied too hard to get good grades for the tests. b.My daughter studied enough hard to get good grades for the tests. c.My daughter studied so hard to get good grades for the tests. d.My daughter studied hard enough to get good grades for the tests. 2.. Nobody helped my classmate to dust his desk. * a.My classmate dusts his desk himself. b.My classmate dusted his desk himself. c.My classmate dusted his desk in his own. d.My classmate dusts his desk in his own. 3.It is necessary for the school students to get vaccinated before they return to school. * a.The school students are going to get vaccinated before they return to school. b.The school students are necessary to get vaccinated before they return to school. c.The school students need to get vaccinated before they return to school. d.The school students plan to get vaccinated before they return to school. 4.It took us nearly two hours to reach the peak of the mountain. * A.We took two hours to reach the peak of the moutain. B.We need nearly two hours to reach the peak of the mountain. C.We spent nearly two hours to reach the peak of the mountain. D.We spent nearly two hours reaching the peak of the mountain.