The outbreak of this incident has given us much for thought, forcing us to ______ seriously on the past and the future.

______ didn’t Sally play the violin at the concertlast night—She said that her hand hurt, but that was only anexcuse. I saw her play tennis just now.

Vivian refuses ______ her children to the weekend training centre for extra classes.

________ no need for everybody to discussthe problem again since it has already been solved

The store sells sweaters _____ a very good price. Wecan buy one ______ 40 yuan.