讓步根本未能平息學生的憤怒。
The concessions did little to placate the students.
不到20個學生考試全部及格。
Fewer than 20 students passed all the exams.
學生須在8:30以前到校。
Students are required to be in school by 8.30.
學生可以免做16–18題。
If you are a student, you can omit questions 16–18.