- 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.
- As far as she is concerned, one piece of music is very much like
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