South Korean rapper PSY’s hit song Gangnam Style made history on December 20 as first-ever video on youtube. com to reach 1 billion views.

_____ made the school proud was _____ more than 90% of the students had been admitted to the key university.

Many large cities，such as Liverpool and New York，have had experiments of this kind，_______old factories turned into successful art centers

el it necessary that everything by the time our manager arrives.— Yes, to make sure the conference is held on schedule.

Tom said he would tell us _________.