— ______ do you have the drawing lessons? The pictures you draw are so beautiful.— Once a week. I began having drawing lessons at the age of five.

There is little doubt in your mind that he is innocent,             ? (2012江苏)

--_______students are there in your class,Mr Li?  --Fifty.

He must be helping the old man to water the flowers,______ ?      

—Will people live to be 300 years old?    — ______________.