In that school, English is compulsory for all students, but French and Russia are ____ .
Mary hurt her friend’s feeling, but she didn't do it ____purpose.
Do you think _____ important _____ us to learn a foreign language?
—I’ll travel to Switzerland this summer. —________.
Claire had her luggage an hour before her plane left.
It took her a long time to ______ the skills she needed to become a famous player