t school, English is compulsoryfor all students, but French and Russian are ______

Linda is thirteen ________ old. She is my friend.

I know you’re busy these days, but you’d better___________ off today’s work till tomorrow.

We were all missing you at the party!— SorryI was busy with my project researchOtherwise, I ___________ it

Jumping out of ______ airplane at ten thousand feet is quite ______ exciting experience.