Do you have any plan for this summer vacation, Mary?— Sure, I’ d like to be a volunteer and help to ______ the Central Park.

My mother spent about 2,000 dollars ______ the piano.[ ]

The man ______ a pair of glasses on his nose is my physics teacher.[ ]

His eyes suddenly widened. I knew a good idea must have _________ to him.

I have changed my job. — _____.[ ]