For environmental reasons，we as well take these waste products and have them recycled.

I was greatly impressed __________ the speech by the mayor of Shanghai before the final voting for EXPO 2010

I hope _____on time.

Could we complete the task according to the schedule?—I doubt that．The problem remains _____ we can get financial aid from the government．

.— Hello! Why are you so happy— Don’t you know There _________ a basketball match in our school this Saturday.