——Hi, Mike.Any idea where Mary is? ——She ____ in the classroom.I saw her there just now.
______ the production up by 60%, the company will have another excellent year.
It was in the lab ______ was newly built ______ they carried out the experiment.
— Ann is in hospital. — Oh, really? I ______ know. I ______ go and visit her.
Nowadays, teachers should give less homework to students in order to ______ the amount of pressure they have.
He was crazy ______ his study when he was young, which contributes ______ his success in later life.