Lydia doesn’t feel like _____ abroad. Her parents are old.

In that school, German is compulsory for all students, but English and French are_______.

No one could ________ the failure of the experiment as everything went smoothly at first.

 Students ________ remain in their seats until all the papers have been collected.

You have to keep on learning if you want to keep ______ with the development of modern science and technology.