Enough sleep is very important for health. If you for your favorite programmes， you will feel sleepy in class.

To improve the quality of our products, we asked anyone ____________ had used the products for suggestions.

He lifted the stone only _______ it dropped on his own feet

Shall we go and ________ hello to the foreign teachers –Good idea! Let’s go.

What kind of food is______ , Chinese food, Japanese food or the western food