Chinese is becoming more and more popular. It ________ in many schools in foreign countries.

Is Mr. Green in the office?—No, he ________ be in the office. Look, the light in the office is off.

Tina had nothing for supper, ___ she?—___ . She had some bread and milk.

The whole world is undergoing the biggest financial crisis nowadays, ____ calls for international cooperation among all nations to get over.

This is your pencil. ________ is over there, on the desk.