It was along the Mississippi River ____ Mark Twain spent much of his childhood _____ the story happened. [ ]

Whether dying patientsbe helped to end their lives is a tough moral question.

You can call me _______18851556155 or e-mail me ______ laoli0708@163.com.

This is a very special flower and it can ________a strong sweet perfume at night.

It is late; ____, I’m too tired to go out