1) students need to complete this lab by Wednesday
2)Our group had to conduct an experiment in two hours
3) The academic semester is due to start in September
4)our scientists can carry out very complex research
5) we don't need to learn this theorem for tomorrow
6)I will have to attend an additional seminar tomorrow
7)We decided that we should all take part in the conference
8)I couldn’t help you yesterday and unfortunately I won’t be able to help you tomorrow. you have to do this job without my help
9) can i take your pen? -Yes
10)he should already be at home
