I was overjoyed at the news of my county _____ so much progress.

The little girl is ignorant _____ the basic rules of English grammar。

In most countries, the metric system has been _____ for all measurement.

Edison tested more than one thousand materials to see if they could _____ electric ; current and glow.

How can you _____ and watch the country go to ruin?

To begin some activity is to _____ doing it.

You've only got a slight cold. You'll _____ it in a day or two.

He read the story _____ - for everybody present to hear.

He is very _____ and well-qualified, so he should reach the top of this profession.

The manager gave her his _____ that the complaint would be investigated.