In order to make our city more beautiful,we have planted _______ trees these years in Yiyang.( )
A.three thousandsB.thousand of
C.thousands of
They have to do a lot of work, ________ they?
()---Are you confident about the basketball match against Class 9, Yangyang? ----_________ I’ve got everything ready!
---- ______will Mrs. Lin go to Canada? ---- To see her daughter there.
-- _______is it from here to the station? -- It’s ten minutes’ ride.
--________ does your father visit your grandparents a week? –Once.