We seldom hear American ________ a friend or family member using the full name.

—How about your travel? —You can hardly imagine what difficulty we have had ___________ the vast desert.

The efforts of a government should be _______ in terms of the health and happiness of the people as well as the development of economy.

—How can I use the equipment?—Well, just refer to the ________.

— What does Mary do?    — Her job ________ helping old people who live alone.