What          her most was that nobody had even bothered to tell her about the changed timetable. 

.After the clock          twelve, the students walked out of the lecture room.

—What about the protection?—Let’s keep the surface        dirt by putting a cover over it.

In 1986, the Chinese government ________ a law stating that by the year 2000 every Chinese child would have nine years of compulsory education.

While in university, we were offered a number of afterschool activities to _____ our social skills．