David is only four years old, _______ he plays the piano very well.
—Can you play tennis _______ me? —Sure, I' d love to.
—Who’s that boy? —He is my cousin, and _______ name is Jack.
—Zhang Lei, do you have _______ soccer ball? —Yes, I do.
Can the scientist ______ [iks'plein] the reasons for changing the plan?
I usually ______/'præktIs/ the piano after school.