（2013北京卷）23. The famous musician, as well as his students, ____ to perform at the opening ceremony of the 2012 Taipei Flower Expo.
A. we re invited B. was invited C. have been invited D. has been invited
（2013福建卷）22. Don’t turn off the computer before closing all programs ______ you could have problems
A. or B. and C. but D. so
（2013福建卷）34. Not until he went through real hardship _____the love we have for our families is important.
A. had he realized B. did he realize C. he realized D. he had realized
