You are _________ to have such a good teacher.

---- Can you show me how to use Ipad 2? ---- Why don’t you just read the _____?

Now that there are only a few minutes left, we’d better talk about the plan in _____.

Form their ________ on the top of the TV Tower, visitors can have a better view of the city.

In this experiment, the famous professor showed three different____ to the study of physics．