The trend of Phubbing group (低头族) getting increasingly large is spreading worldwide, ______ many problems such as traffic accidents and cold interpersonal relationship.

The project, ______ at the end of 2008, expanded the city’s telephone network to cover 1,000,000 users.

I have already told our class teacher that the windows of our classroom require       .

____your own needs and styles of communication is as important as learning to convey your affection and emotions.

—What makes Tom unpopular with his fellows?—__________.