He didn’t listen to the teacher carefully, __________, he couldn’t answer the questions.

Our General Secretary Hu Jintao attended the G8 Summit in Sweden, which _____ eight important advanced countries.

To_____ his position in the country, he appointed his close friend Henry as head of the troops

Will you waste your time andmoney on that — Certainly ________.

What do you think of the program Sing My Song on CCTV–It’s a good chance to those musicians ____write their own songs.