What’s the matter with you —______ the window , my finger was cut unexpectedly.

The school finally listened to thestudents’repeated request that they_______a seven-day holiday on NationalDay

The Maths problem is so difficult that _______ students can work it out.

Jane won the first prize in the English speech contest．—______big progress she has made!She used to be weak in English．

It is necessary for children to exchange ideas with parents from time to time so that the generation gap between parents and children can be _____.