Edward, you play so wellBut I __________ you played the piano

Not until I completed the form　　　　that half questions were not relevant to me.

Your broken English is all very good. How do you improve it —Thanks. Mrs. Wang always asks us to dialogues in our English classes.

There is a mountain ________ the top is always covered with snow.

As one friend of his, you should give him a hand when he is in trouble.