111.  The smog in Guang Zhou was sometimes so thick and filled with pollution.

112.  So we must begin to solve the air pollution problem of GuangZhou .

113.  So I got to school at 7:30.

114.  So I thought it was worth running in the rainy day, because it had lost its meaning .

115.  So we were very angry.

116.  So I had to take the raincoat from time to time.

117.  So I must take the raincoat in all day.

118.  So have lost interested in the food of breakfast .

119.  It was difficult o see so busy before the new playground had completed.

120.  So I must try my best to study.