The doctor has ________a new idea on thetreatment，which iswell thought of by his companions.

Helen is our new teacher and she teaches science.

When do we need to pay the balance— ____ September 30.

Mozart had a amazing gift for art and his music is well worth ____________.

—Did Alice enjoy the concert held in Grand Theater yesterday?—Yes, she did. She ______ such an excellent concert for a long time.[ ]