- The association is ________ to raising funds to help the blind.
- Since William had been seriously ill for several months, his parents were worried about________ to return to school full-time.
- It ________ as a shock to realize that I was not alone in the room.
- ________ so many people in the United States been out of work as today.
- When he suddenly ________ up the subject of genetic engineering, there was an embarrassedsilence.
- The problem ________ when the students refused to do their homework.
- This diploma ( 毕业文凭 ) ________ that you have completed high school.
- To succeed in a scientific research project ________.
- The more we looked at the picture, ________.
- I know it isn ’t important but I can ’t help ________ about it.
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