1. ---How did your students express their thanks to you on Teachers’ Day?
---A gift together with many flowers _______ sent to me .
A. is B. are C. was D. were
2. ______ from other continents for millions of years, so it has many plants and animals that cannot be found anywhere else in the world.
A. Having been separated B. Separated
C. It has been separated D. Having separated
3. It was until October that they _____.
A. finished their long journey B. paid off the debts
C. reached an agreement D. worked on the project
