________ the question of how global warming has _________, we are doing some projects at school.
The church tower which_________will be open to tourists soon. The work is almost finished.
In ancient times, people rarely travelled long distances and most farmers only travelled ___________ the local market.
---Sorry, Professor Smith. I didn’t finish the assignment yesterday. ---Oh, you___________ have done it as yesterday was the deadline.
Every few years, the coal workers ___________ their lungs X-rayed to ensure their health.
If our parents do everything for us children, we won’t learn to depend on___________