15. All the engineers ________ how the parts of the machine fitted together.

14. You see I’m a student of art; I’m not very ________ with botanical names.

13. Last year I heard that they ________ marry, but they haven’t so far.

12. This term I will attend an oral training course in order to improve my ________ English.

11. His overcoat is so long that it is almost ________ the floor.

10. Tom is such a ________ student, always asking questions about everything he doesn’t understand.

9. The balance of nature changed when goats ________ to this island.

8. We have ________ tastes in music, though there is a big difference at age between us.

7. We both are not in time; I think there must be some ________ over the time.

6. The teacher usually ________ the students for their being late by asking them to stand outside the classroom.