The passive:
tenses 1 Complete the text with the correct form of the verb be. More than one answer may be possible.
A bid to improve educational performance Much to the delight of high school students, it is likely that the beginning of the school day (1) delayed at some point in the future in order that teenagers can get more sleep. After studies (2) carried out in the United States over three years with 90,000 students across three states, it (3) shown that educational performance dramatically when students got more sleep. There were also far fewer car accidents! Currently, this experiment (4) rolled out across a wider range of schools with very positive results. Obviously, much more research (5) needed, but there are hopes that there will be similar results when a pilot study (6) trialled in the UK later this year​