It is easy to be grateful for the good things, ______ a life of rich fulfillment comes to those who are also thankful for the setbacks

Emergency line operators must always ________calm and make sure that they get all the information they need to send help.

The girl is from China. Ping-pang is easy ______her.

We have two foreign teachers here. One is from England, and ______ is from America.

He feels lonely because he has no close friends ____.