Mum, would you please buy me an MP5 player—If you can help do the dishes the whole vacation, you________ have one as a reward.

There is a real possibility that these animals could be frightened, ________ a sudden loud noise. [ ]

Life is stressful, and complaining may be considered by many as an extension of being________normal

I think PE is one of ______subjects of all.

Jenny did very well in maths exam.–Oh,yeah! She is _____ maths.