1. He _______ us with a nod. (greet)

2. Each colour on the chart _______ a different department. (represent)

3. My son felt _______ when he saw his own reflection in the mirror. (curiously)

4. A foreign guest _______ us and asked us the way to the Shanghai Expo. (approach)

5. China is building up her army force to _______ herself against the enemy. (defence)

6. All _______ have been cancelled because of fog. (fly)