.Symphony means a long piece of music that has three or four parts or ＿＿.

Professor Li has earned a world ____ with his pioneer research in biochemistry.

Niagara Fall is a great tourist ________, drawing millions of visitors every year.

There was only one ____ of transportation in this mountainous area five years ago.

—Hello, I’d like to speak to Henry. —Oh, which _______? There are two ______ in our office.